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Traditionally, the people of Bermuda rely on shark-oil based "barometers" to predict storms and other severe weather. Small bottles of oil are hung outside. If the bottle is clear then the weather will be good, while, if it is cloudy, it is advisable to take cover. They are not true barometers, and how they work is disputed. [16]
Elasmobranchs lack swim bladders, and maintain buoyancy with oil that they store in their livers. Some deep sea sharks are targeted by fisheries for this liver oil, including the school, gulper and basking sharks (pictured). [1] All three of these species have been assessed by the IUCN as vulnerable due to overfishing. [2] [3] [4]
The entire body of a shark is a very efficient eating machine. Each organ has been fine-tuned for hunting and acquiring food.
Plastic pollution in the ocean is a type of marine pollution by plastics, ranging in size from large original material such as bottles and bags, down to microplastics formed from the fragmentation of plastic material. Marine debris is mainly discarded human rubbish which floats on, or is suspended in the ocean.
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Find out more in the… Historian of marine science Samantha Muka, of Stevens Institute of Technology, doesn’t dismiss the fear that a great white shark can inspire. But Muka offers a reminder ...
Shark finning refers to the practice of cutting the fins from live sharks while at sea, and then discarding rest of the fish back into the ocean. If they are still alive, the sharks either die from suffocation or are eaten because they are unable to move normally. Shark finning is widespread, and largely unregulated and unmonitored.
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