Shark fins are very valuable in the Chinese market because they are used to make shark fin soup, a delicacy said to be a symbol of prosperity and good health.Įven though all fishing vessels are required to have an Automatic Identification System (AIS), many find a way around it. RELATED: Hammerhead Shark Hunts Up a Meal in Florida FootageĪs it turns out, these sharks had actually been caught by illegal fishing vessels, likely for their fins. It looked as though they were swimming far west in zigzag patterns. From studying the data collected by the tagged sharks, Doulas, Cousteau and their teams were able to see that the sharks actually were moving much further into deep ocean waters than they expected. In order to study their behavior, these citizen scientists had to mark several sharks with satellite tags. Our question was, how is it possible for these sharks to repopulate these islands if they're non-migratory?"Īfter such devastation from the nuclear testing, how did these sharks repopulate without really going anywhere? Cousteau told Seeker he had one question in particular he wanted to answer while studying these sharks: "Reef sharks are non-migratory species. Philippe Cousteau, grandson of the famous diver and explorer Jacques Cousteau, is a marine conservationist that worked alongside Douglas and his crew. Douglas and his team set out to tag Gray Reef Sharks in order to study the way they rebounded after multiple nuclear explosions. Due to risk of radiation exposure, very few people visit this area, which is one of the reasons it became a sanctuary for several different threatened shark species. ![]() In 2015, Patric Douglas, a film producer who doubles as a diver, put a team together to study the effects of hydrogen bomb radiation on the marine life in the Marshall Islands. Codenamed Castle Bravo, this hydrogen bomb was 1,000 times more powerful than the bomb dropped on Hiroshima, Japan during WWII. In fact, the most powerful nuclear device in the world was detonated here. performed nuclear tests from 1942 to 1958. It's also home to Bikini Atoll, the place where the U.S. ![]() The Marshall Islands are home to the largest shark sanctuary in the world, an area of the Pacific Ocean four times larger than California.
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