But less than 100 shark attacks a family are reported throughout the world. Sharks are most common in warm seas and oceans. Whale sharks, are the largest shark cognize to man. Sharks are classified in the order Selachii, which belongs to a big class of fish called Elasmobranchi. The earliest shark-like vertebrate fossils are from the Devonian finish of the Paleozoic Era. Some kinds of sharks live in the depths of the ocean. The smal...If you want to thread a full essay, order it on our website: Orderessay
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