Thresher sharks have a caudal fin, also called a tail fin, that are as long as – and sometimes even longer than – the rest of the body. Alopias vulpinus, Alopias supercilosus and Alopias pelagicus are the three species of thresher shark. Other than aiding in swimming, these sharks may use their lengthy tails to stun fish and other prey before eating them.
Although the largest living shark is the Whale Shark, it does not have the longest tail. The Trasher Shark holds the record for the longest tail – which is typically just as long as their entire body. The average Trasher Shark is between 10 – 17 feet long and can be found in Canadian waters.
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