Filmmaker's Journal: a personal sweetheart (aka: shark) at Isla Guadalupe

From September through November, a young - geologically speaking - and rocky island off the Pacific coast of Baja, Mexico, turns into the world's premiere site for viewing great white sharks. Isla Guadalupe, a government-protected biosphere, becomes home to a migratory group of 70 to 100 white sharks, ranging from 12-foot hyperactive males to enormous 18-foot females. During this time, a cadre of international shark ecotourism operators play host to divers, photographers, and the curious thrill-seekers by providing cage diving experiences, enabling people to view these impressive predators in their natural environment.

It is often a game-changing experience for those who consider these sharks as the ultimate, malevolent denizen of the deep. Instead they typically come away with a new-found respect for these magnificent animals, both impressive and endangered, and hopefully they will return home with an appreciation and concern for the threats these sharks face in today's world.

I have just returned from my 17th trip to Isla Guadalupe, spanning 7 years of filming these sharks either for my documentary, Island of the Great White Shark, or on a film assignment, or for stock footage. At the end of each season, I always find myself thinking, "Well maybe that's enough," and yet each fall I am drawn back to this remote spot once more. Such is the allure of the great white shark; there are other sharks that are more beautiful, more exotic, or even more endangered, yet there is something about this particular animal that has found a place in my subconscious.

On this particular trip, I was accompanying my good friend and photo-journalist, Budd Riker, who was there to do a magazine article. This was Budd's first trip to Isla Guadalupe and his first chance to see white sharks in the wild. The trip was arranged by Shark Diver and we were aboard the MV Horizon along with 14 other paying passengers. This would be a somewhat low-key trip for me; whenever I am aboard with paying passengers then my filming techniques become more conservative, confining myself to the cage, as I do not want anyone to assume that they can take the same risks that I do as a paid professional.

This afforded me more time to relax and view these animals without worrying about lighting, exposure, focus, and all the other things that fill your mind when you are hoping to turn a brief encounter into a long-lasting film or video image. This more leisurely pace also allowed me to think back on other memorable trips and memorable sharks - most of these sharks migrate back to Isla Guadalupe year after year and they are easily recognizable, so it's a bit like a reunion and seeing old friends once again.

In particular, I have a sweetheart at Isla Guadalupe: "Mystery," an 18-foot, beautifully proportioned female, stunning in her size and grace in the water. In 2006, while at Isla Guadalupe to get a few remaining shots for Island of the Great White Shark, Mystery appeared to me for the first time and spent two full hours being curious as to the bait offered by the boat and equally curious as to the diver in the water with the large camera. Time and time again she would cruise directly towards me and turn at the last moment, right in front of my lens, providing me with wonderful close-ups. Upon my return home, I re-cut several scenes in my film to take advantage of the magical moments this one particular shark had provided me.

So impressed was I with Mystery that, on a future trip in the Bahamas, I met sculptor Bill Wieger and commissioned him to do an accurate, museum-quality rendering of my favorite white shark based on my video footage. The end result has become a regular feature of Bill's line of animal sculptures but Mystery #1 hangs on my living room wall - a reminder of a special moment in time when nature was most accommodating.

However, for the next two years Mystery was not seen at Isla Guadalupe. Sometimes the white sharks, particularly females, will skip a year. Researchers are not exactly sure why: Does it have to do with reproduction or gestation? Do they simply just stay in one place or travel to a different location? There's no definitive answer yet - one of the many unsolved mysteries regarding these animals - but an absence of 2 years or more is always a reason for concern as the shark may have run afoul of commercial shark fishermen or perhaps was fatally injured in an altercation with another shark.

Or it could have succumbed to natural causes. The life span of a great white shark is estimated to be around 30 to 35 years, but that is an estimate based on the ages of other species and the age of mature white sharks caught by fishermen. No one has found a white shark dead of old age.

I was beginning to worry about the fate of Mystery when, near the end of the 2009 season, she had been spotted at Isla Guadalupe. But she was not seen the following year and had not been spotted this season so far. So once again, I began to wonder if my favorite shark model had met a sad end. Long-standing regulars like "Shredder," a large male who has visited the island every year for the past 10 years, had made appearances - but no Mystery.

During our stay at Isla Guadalupe, we were visited by Dr. Mauricio Hoyos, a prominent researcher of the island's white sharks. I first met Mauricio when he was just a grad student studying under Dr. Felipe Galvan of Mexico's marine institute, CICIMAR, and Dr. Pete Klimley of UC Davis. I featured Mauricio in my documentary and we have remained friends ever since. Mauricio has been coming to Isla Guadalupe each year to tag the sharks with transmitters and track their movements and other vital information so as to gauge the health of the population - he is undoubtedly "Dr. White Shark" of Isla Guadalupe.

As he approached the Horizon in the small boat he uses for tagging, Mauricio announced that there were several new sharks spotted so far this season: several new males and a couple of large females. In fact, over the course of our stay, we saw two new males and one female that were new to the island. Individual great white sharks have unique markings, much like fingerprints, and all the sharks that are seen at Isla Guadalupe are numbered and cataloged for future identification.

And then Mauricio added one more shark that had been identified recently that made me throw my hands up in a combination of joy and relief: Mystery had been spotted. It was getting a bit late in the season but the ol' girl that had graced me with such marvelous images years before finally made an appearance. Later that day, we were visited by a very large female and many thought it might be Mystery but I saw that it lacked her distinctive dark mark, like a birthmark, on the fourth gill slit on the left side. It turned out to be female #109, a very impressive animal and the largest shark seen during the trip.

But even though Mystery and I did not get a chance to meet and say hello after all these years, I was content knowing that she had been spotted. I suppose it's all a bit silly. And, given their estimated life span and the threats that they face year in and year out, it is inevitable that sharks like Mystery and Shredder will disappear from Isla Guadalupe forever - that's nature's cycle of life. However, that is the power of having the opportunity to see these sharks - and many other animals - in the wild. If done responsibly, ecotourism can impress upon the participants both the beauty and fragility of our ecosystems and the importance of protecting them for their own sake and ours.



Click here to see Mystery and learn about Island of the Great White Shark.
Visit Budd Riker Photography.
See Bill Wieger's animal sculptures.
Visit Shark Diver to learn more about shark ecotourism trips.

White Shark Rescue: SoCal surfers come to the aid of a juvenile shark

As California shark conservationists, supporters, and advocates wait for Gov. Jerry Brown to sign into law AB 376, the shark fin prohibition; we get reminders that perhaps the tide of public opinion is slowly turning in favor of the sharks. Pete Thomas' Outdoors, action, and adventure reported an unusual rescue at Venice Beach in Southern California:

"Sharks have many allies these days, as people, states and even nations are rallying behind efforts aimed at conservation.

But for a group of surfers and other witnesses at Venice Beach, Calif., over the weekend, one shark in particular needed rescuing, and it was a precarious job well done, as you can see in the accompanying video.

The juvenile white shark apparently was hooked on the city pier and became stranded on the shore with the fishing gear still in its mouth. It appeared listless and in bad shape, but at least its rescuers got the hook out and gave it a chance to survive.

The incident occurred one month after an angler reeled to the surface and gaffed a white shark from the Huntington Beach Pier. He became the subject of an investigation because white sharks are protected in California and it's illegal to kill them.

Southern California waters are a nursery area for juvenile white sharks, which prey on fishes, rays and smaller sharks until they grow large enough to begin preying on seals and sea lions."

I'll be back among the white sharks at Isla Guadalupe in two weeks. I'll be sure to let the big mommas and poppas down there know that their youngster is all right.

A Great White Adolescent: juvenile white shark makes rare appearance for whale watchers

Here's a bit of fun news, perfectly timed as Discovery Channel's Shark Week prepares to launch this coming July 31st. In his blog, Outdoors, action and adventure, Pete Thomas reports on a Southern California whale excursion boat that was able to provide a little extra for its passengers - in the form of a great white shark.

After watching several blue whales, which will frequent the local California waters as part of their annual migratory trek, the passengers and crew of the Dana Pride were briefly visited by a juvenile white shark, perhaps measuring around 10 feet. There are some shark researchers who say female white sharks will give birth along the coast and as they move on as part of their normal migrations, the juveniles will remain in the area, feeding on fish and growing until the migratory lightbulb goes off in their heads and, as they reach adulthood, their feeding habits switch to seals and sea lions as the preferred prey.

However, they don't spend much time near the surface, so sightings are fairly rare. But they're there all the same. As evidence, many of the white sharks that the Monterey Bay Aquarium has had on display over the years, as part of their successful captive white shark program, have been juveniles caught by fishermen in their nets in, you guessed it, Southern California.

The captain, Todd Mansur, was able to take a short video on his cellphone of the approaching shark. Although one reader of Pete's article commented that it was a mako shark, it appears to me to be a juvenile white shark, not only because of its size and proportions but because of its relaxed movement in the water.



Having been to Isla Guadalupe, Baja to film the white sharks that migrate there in the fall months (I'll be there again this October), I have seen many familiar toothy faces return to the island year after year. But, unfortunately, there are a few sharks who have not been seen in some time, so I always enjoy hearing or seeing evidence of potential future generations of these important predators whose numbers have greatly diminished over the past few decades.

Read Pete Thomas' account of the visiting white shark.

Tracking Great White Sharks: researcher reconsiders a controversial technique

The first shark I ever filmed professionally, to this day, probably remains as my all-time favorite: the great white shark. There are certainly sharks that can rival its beauty. And I have had my adrenaline pumping while swimming in the midst of other sharks in a frenzy - something you don't see with white sharks. But there is something so overwhelmingly magnificent when I am in the presence of a great white, that it still takes my breath away (or maybe I'm just trying not to spook the shark with my bubbles).

Because of that special allure, I have always been interested in their survival and the research and conservation efforts of others to solve the mysteries regarding their lifestyle that still exist today. As those mysteries are slowly unraveled, we will be better educated as to how best to manage and protect the remaining white shark populations, which are in perilous decline.

Over the past year, there has been quite a controversy within the shark research and, particularly, the shark advocate community regarding the research methods of Dr. Michael Domeier - techniques that were featured in the National Geographic television series Operation: Great White and can be seen in Nat Geo's new series Shark Men. Domeier devised a method that entailed hooking a great white, tiring it out to where it could be pulled up onto a large boat platform and hauled out of the water. Then, with only a few minutes available to Domeier's team, blood samples and measurements were taken and, most importantly, a long-range, long-term satellite or SPOT (Smart Positioning and Temperature) tag was bolted to the shark's dorsal fin. The shark was then released and tracking of the shark's position would begin in the hopes of determining more precisely what the migration patterns were of these animals.

From the start, there were questions as to whether this particular technique Domeier had devised was harmful to the sharks. It certainly wasn't a minor procedure and appeared fraught with animal trauma from the moment the shark was hooked to when it was dragged aboard to its final release. I, for one, had expressed concern that the method seemed overly complicated - a kind of Rube Goldberg attempt - and one that was perhaps better suited for the making of a dramatic television show.

There were some shark researchers who had expressed both concern over the method of capture and the quality of the data. But the scientific and academic community is a small and tightly-knit world and so opinions were, for the most part, somewhat muted.

However, the online world of shark advocates had a field day with Domeier, particularly with one horrendously botched attempt that left a white shark, named "Junior", with a large portion of the hook lodged deep in its throat. Recently, pictures of that shark have emerged one year after its capture and they show a noticeably emaciated shark with severe wounds that may or not be a result of the bungled tagging episode. The simmering cauldron of online opinion once again went into full boil.

So, what is the latest in this controversial saga? With National Geographic Channel's Shark Men about to air, what can we expect from Dr. Domeier and his white shark research? Well, according to MSNBC, Domeier is in the process of retooling his research techniques. While still defending his capture methods, he is not pleased with the tags themselves and how they are attached. These SPOT tags are rather large and when attached to the shark's dorsal fin, can apparently cause deformation or damage. Domeier is investigating techniques for attaching SPOT tags that would minimize any possible damage. To better focus on this problem, he has chosen not to participate in the television series. From a crisis communications/PR perspective, it's also not a bad idea to take yourself out of the limelight for a while when surrounded by controversy.

Researchers are often faced with difficult decisions regarding the methods by which they gather data, the cost to the subject in question, and how much public media exposure can be advantageous in securing funding or possibly setting you up for intense scrutiny and even ridicule. I would hope that technology would prevail and powerful, long-lasting tags - much smaller and lighter in design - could be developed which would negate the need for such elaborate capture methods as Dr. Domeier felt compelled to employ.

We owe the sharks that much. Even a 16-foot, 3,000 pound great white shark deserves a little tenderness now and then.

Read MSNBC's article on the Domeier controversy.

Great White Shark: San Diego sighting adds one more juvenile to population

This past Thursday, in San Diego, California, a 5-foot juvenile great white shark was reported by two scuba divers at around 500 yards off shore of La Jolla Cove in about 30 feet of water. Lifeguards briefly closed the beach while they cruised the area but soon reopened the beach, issuing a precaution to swimmers and leaving it at that. The local press reported the sighting without any overwrought hysteria and moved on to their next sound bite.

Chock up one for common sense.

Frankly, it does my heart good to hear of these sightings. With each juvenile seen, we know there is one more shark to add to the white shark's precarious population; one more shark that can, in 10 years, reproduce and, as Matt Hooper said, "make little sharks." Juvenile white sharks do not pose a substantial threat to humans as they are fixated on fish as menu items. It won't be until they reach maturity that they graduate to pennipeds (seals and sea lions) and the possibility of a surfer or swimmer being mistaken for a seal could occur, and has occurred.

But why off of warm Southern California? Juveniles have been sighted from Malibu to San Diego. There are deep canyons that run along the coastline in which juvenile white sharks can comfortably cruise, feeding on fish, while adults have generally taken up their migration patterns that often bring them to areas of seal or sea lion concentrations, like the Farallon Islands off San Francisco and Isla Guadalupe far off the Baja coast.

A recent report from the Shark Research Committee, a California non-profit headed by well-known shark behaviorist Ralph Collier, cited 7 unprovoked shark attacks along the Pacific Coast in 2010; 5 in California waters and 2 off the Oregon coast. Only one attack produced a fatality. Of interest were the activities the people were involved in at the time of the incidents: 3 surfing, 2 kayaking, 1 paddle-boarding, and 1 boogie-boarding. All surface activities, all included an elongated shape with limbs or paddles in the water. When you add in the right conditions of low visibility or other possible attractants like heavy splashing or nearby pinnipeds, all lend themselves to the classic scenario of mistaken identity as the white shark executes its typical single-bite ambush technique which it uses on an unsuspecting seal or sea lion (although not definitively confirmed, the white shark was suspected in all seven incidents). The attacks also took place in the late summer/early fall. This is when many adult great whites are on the move, returning from their mid-Pacific migration, back to their coastal hangouts.

Given the image that is generally served up by the media, I don't expect the general public to rejoice with every sighting of a great white shark along the California coast. But it's good to know that the circle of life is still taking place for these threatened ocean predators who play such an important role in balancing the marine ecosystem. Hopefully, the juvenile white shark seen off La Jolla Cove will not encounter poachers and live to carry on the species.

Read about the white shark sighting in San Diego.
Read about the Shark Research Committee report.

Sharks: Kuwait and Canada are losing important predators

A couple of items on sharks:

Documenting the Lack of Sharks in the Arabian Gulf
Sharks have been suffering at the hands of large commercial operations to meet the demands for shark fins in the Asian markets. But they can also suffer due to ignorance and, in a sense, neglect. This is what is happening in the Arabian Sea.

An expedition, organized by the U.K.'s Shark Conservation Society in 2008, set out to document the range of shark biodiversity in the Arabian Gulf waters around Kuwait. With the discovery of oil, Kuwaiti culture has changed from fishing and pearl diving as key industries to one based entirely on the lucrative oil business. While fish are still in demand among the Kuwaiti people, there is a lack of concern or awareness as to the need for balancing marine biodiversity - in particular, maintaining healthy shark populations as a cornerstone to a healthy marine ecosystem.

In the local fish markets, sharks can be found but there is not a great demand for them. Their appearance is more one of being bycatch due to the fishing techniques commonly used by the local fishermen. Gill nets are the predominant method, which basically catch anything from edible, commercial fish to sharks to turtles, and more.

Environmental filmmaker Zeina Aboul Hosn accompanied the researchers, both on the water and in the local markets, to document the decline of sharks in the Gulf. Finally, two years later, her film is currently available for viewing on Al Jazeera.



According to GreenProphet.com, Exxon has pledged support for an educational program to increase awareness, establish community-based programs, and provide cleanup activities, which could prove beneficial to local shark populations - if there's still time. Exxon's motives, I am sure, are a mix of environmental concern, politics, and public relations. Whatever their self-serving motives, if it provides a means to educate the local populace on the importance of maintaining a balanced marine ecosystem - for sharks and other species - then it could be a worthwhile trade-off.

Read more about the state of sharks in the Arabian Gulf at the GreenProphet.com.

Canada Considers Support for Great White Sharks
The Canadian government is considering placing the great white shark on its list of animals covered by Canada's Species at Risk Act. Great white sharks are known to travel as far north as Nova Scotia in the Atlantic but their numbers have been in steady decline, in line with what has been seen with many white shark populations worldwide.

Although hunting white sharks in Canada is currently illegal, by covering it under the Species at Risk Act the balance of responsibility changes slightly from something that was solely on the shoulders of the fishermen ("Do not hunt white sharks") to more involvement by the federal government ("What can we do to further protect these sharks?"). This would mean another partner in the international political arena - where worldwide policy is hammered out.

"It's really a matter of supporting other international efforts to reduce catches of great whites and somehow limit their by-catch in other fisheries," said Steven Campana of Nova Scotia's Bedford Institute of Oceanography.

Read more about Canada's great white sharks at CBC News.

Shark conservation is becoming more and more of a complex topic as we move beyond (but don't ignore) the barbarism and waste of shark finning and shark fin soup and focus more on the critical role these predators play in maintaining a healthy marine environment and the need for worldwide public awareness to stimulate action on local, national, and international levels.

Island of the Great White Shark: a stocking stuffer with teeth

Okay, readers, here's my one crass holiday plug. Island of the Great White Shark is my documentary tribute to the great white sharks of Isla Guadalupe, Baja and the dedicated researchers and scientists who study these amazing animals.

Going on six years ago, I spent several seasons filming the white sharks that migrate to this prehistoric island about 150 miles of the coast of Baja, Mexico. Since then, the lead Mexican researcher featured in the film, Mauricio Hoyos, has gone from grad student to Ph.D. but still returns to the island each year to tag and track sharks.

With online sales in full swing this weekend, you can find the DVD of Island of the Great White Shark at Amazon.com. Amazon also suggests other shark DVDs, like a Discovery Channel Shark Week collection and a well-seasoned classic like Blue Water White Death. That would give you quite a range of perspectives from sensationalistic to realistic, from fearsome to fascinating.

Check it out and may your holiday shopping be a pleasant and sane one.

California's Great White Sharks: expert hints at numbers on the rise

Having spent a good portion of my cinematic time filming the great white sharks of California, particularly those that migrate south to Isla Guadalupe, I was heartened by the news that the local populations of these animals might be showing signs of improvement. With all of the uphill battle issues we are having to deal with regarding ocean conservation, it's nice to to get some possible good news for a change.

Making the rounds of the shark blogs, like SharkDivers', is a recent article from Pete Thomas posted in his Outdoors blog. Pete has had a strong interest in white sharks and has been to Isla Guadalupe several times to see them first hand. He writes of some positive comments from Dr. Chris Lowe, director of the Shark Lab at the California State University Long Beach, and someone who has studied a variety of California elasmobranchs for years, from white sharks to leopard sharks to round stingrays.

Pete writes, "It almost seems implausible, in an era during which so many species of sharks are overfished and believed to be in decline, that any species could mount a comeback. But considering the changing landscape off California, a comeback and its timing make sense. The ban on fishing for white sharks -- for sport or commercially -- was imposed in 1994. That same year, voters approved a measure outlawing the deployment of gillnets within three miles of the California coast."

According to Dr. Lowe, "So if you add those two things [better fishing regulations and increased numbers of seals and sea lions] together, you've got a restored forage base for the adults and you've got better survivorship of the pups," Lowe said. "So what we think we're seeing from the fishery catch data and some of the other anecdotal pieces, is the actual recovery of the white shark population."

But we're not completely out of the woods yet. White sharks are migratory and do not heed the limits of national or regional ocean borders that might provide a degree of protection. These sharks are still threatened by commercial fisherman in international waters (white sharks are not specifically targeted but are subject to loss as bycatch in gillnets) or by poaching (juvenile white sharks are still being caught and sold in local seafood markets in Ensenada).

"If what we are seeing is truly an increase in the white shark population that would be a relief. Currently we are finding that the total number of adult white sharks along the west coast of North America is much smaller than many people expected," says Salvador Jurgenson, who heads up Stanford University's white shark research at the Hopkins Marine Station.

Many thanks to Pete for his article and hats off to Dr. Lowe and his continuing.work. I've had the opportunity to meet with Chris, filming his "round stingray roundup" where a local high-density population of stingrays are collected, measured and released to monitor their growth and overall health. He and his grad students have also conducted metabolic studies of leopard sharks using the Aquarium of the Pacific, where I was a volunteer dive team leader, as a test bed facility. Some good news - nice way to start the day.

Read Pete Thomas' article.
Top photo: RTSea, Bottom photo: Christy Fisher.

Great White Sharks and Boats: do they stalk small boats?

Great white sharks are known for their ability to ambush and capture large prey, like seals, sea lions, or elephant seals - a common prey because of their high fat content that provides the shark with the energy it needs. But do they selectively hunt and attack boats?

This is the question that The Dorsal Fin blog was asking in response to a recent press release covering the upcoming trans-Atlantic voyage of Wave Vidmar as he prepares for a solo-rowboat expedition this summer. Apparently, previous solo boaters have reported being followed by white sharks for hours, even days, and have experienced shark bites on their vessels.

The press release stated, "Typically Atlantic Great White sharks (Carcharodon carcharias) will follow the tiny ocean row boats for hours to days, then attack by biting the backs of the boats."

That's a pretty bold statement to make and one that The Dorsal Fin rightfully questioned. He received additional information from Wave Vidmar to clarify that four solo boaters had anecdotal experiences of white sharks following them, but that it was not necessarily "typical" behavior. Perhaps an over-ambitious public relations person felt that Vidmar's upcoming voyage needed a little extra sizzle, but let's put it in perspective based on what we do know about white shark predatory behavior.

First of all, great white sharks have two roles as predators: hunters and scavengers. As hunters, besides feeding on marine pinnipeds (seals) and large fish (like tuna), white sharks have been known to feed on cetaceans like dolphins, porpoises, and small whales on rare occasions. Studies have shown that their primary point of attack is on the caudal, or tail, area, as this will immobilize the cetacean.

As scavengers, white sharks have been shown to feed on a variety of cetacean carcasses including much larger whales. The sharks, attracted by the scent of the decomposing animal, will make a slow and careful investigation, and then commence feeding on the remains.

So, could either of these behaviors come into play involving a small boat? Perhaps. The shark may be first attracted to the vibrations given off by the rowing motion. Then the visual of a large dark body floating on the surface may further pique its curiosity - is this a floating carcass? The shark may very well follow the boat for some distance, making a determination as to whether this is viable prey. Bumping the boat or engaging in an investigative bite or nibble, often at the stern (the carcass' "tail"), is not uncommon. But a full-on rush from underneath, as when ambushing a seal, is highly unlikely.

From Great White Sharks: The Biology of Carcharodon carcharias, "While predation by sharks on cetaceans is relatively rare, many sharks scavenge dead cetaceans. White sharks are frequently observed feeding on carcasses of whales off Australia and the eastern United States."

I have had the personal experience of being bumped by a great white shark while sitting in a Zodiac inflatable, during filming. Of course, the "bump" from a 15-foot white shark is no little pat - the shark pushed the inflatable, and the two of us on board, a good foot out of the water. But the shark was merely checking out whether this black mass floating on the surface was a dead whale - it was in its scavenger mode and certainly was not trying to sink the inflatable to get after the two occupants aboard.

So, would a great white shark trail behind a boat and bump or bite it? It's possible. Would it track the boat for several hours? That's also possible; I have seen white sharks spend a considerable amount of time cautiously investigating a tuna head suspended in the water, used by shark divers as an attractant. Would a shark spend days tracking the boat? My gut feeling tells me that's a bit of a stretch. The boaters may be seeing more than one shark over a period of several days. Or it may be the same shark returning, its curiosity once again piqued. But the press release statement seems to imply that the shark is round-the-clock relentless in its pursuit. Sensational but unlikely.

Like the oceanic white tip shark I wrote about earlier, great white sharks are important ocean predators. But we must not think of them as only hunters, continually on the prowl. Their roles as scavengers is critically important and can be the source of their curiosity with surface objects like small boats.

Read the entire press release.
To get some detailed information on white shark hunting and scavenging behavior, read Great White Shark: The Biology of Carcharodon carcharias, edited by Drs. Peter Klimley and David Ainley. Of particular interest is Chapter 27: White Shark Predation and Scavenging on Cetaceans in the East North Pacific Ocean.

Oceanic White Tip Sharks: curious pelagic predators with an unfair reputation

A sleek but muscular body gliding effortlessly through cobalt blue water, its rounded snow-capped dorsal fin slicing the water just below the surface, the Oceanic White Tip Shark is one of the premier pelagic (open ocean) predators.

Beqa Adventure Divers's blog picked up on a series of terrific photos of oceanic white tips, posted by LupoDiver on a recent South Atlantic trip with Jim Abernethy's Scuba Adventures.

Oceanic white tip sharks are important open ocean predators and scavengers. As with most other sharks, they play a critical role in keeping the oceanic backyard clean and the populations of their prey healthy by culling the weak, injured, and sick. They are intensely curious as they do not live in a world of wall-to-wall animals, so anything that catches their attention either visually or by scent is quickly investigated.

Unfortunately, these sharks also have a bad reputation carried down through history as a man-eater. Often attracted by the low frequency sounds given off by sinking ships (not your typical underwater background noise), particularly from sinking warships, these sharks were known to attack sailors in the water - their hunting/scavenging instincts piqued by blood from wounded sailors. Sadly, what began as natural curiosity and a reaction to food stimulus in a limited-prey environment turned into a fearsome oceanic killer reputation. Turn down the anxiety level a few notches and you get a lot closer to the truth, as LupoDiver and his fellow divers discovered on their trip.

Beqa Adventure Diver also comments on LupoDiver's picture of a blue shark, another pelagic predator whose numbers have dropped considerably over the years, a favorite target for the commercial shark fisheries.

My first unexpected encounter with a shark in open water was with a beautiful blue shark, over 20 years ago, off Santa Cruz Island which is part of California's Channel Island chain. Following that, my first cage diving experience was being surrounded by a group of blue sharks. Now, Southern California's blue shark diving operations have all but disappeared and, sadly, I suspect I may never come across another blue shark without a lot of chumming and patience.

LupoDiver, treasure your experience with the oceanic white tip and blue shark. Like the great white shark and others, these are very unique and important members of a healthy marine ecosystem. Without them, both the oceans and mankind are the lesser for it.