History Of Sharks

History Of Sharks

The initial illustration of an assault by what should have been a shark was exposed on a vase uncovered at Ischia, Italy. The vase illustrates a man being captured and killed by a fish, perhaps a shark. This vase was found to belong to the year 725 BC.

According to documentary evidence provided by Greek historians, the oldest account of an attack by sea monster dates back to 429 BC. The history of sharks and their origin is yet not clear and is still vaguer than that of the other category of sea animals. This is probably because sharks have left extremely small evidence of their survival.

In the initial stages of the Silurian period, the oldest shark-like creature was identified from extensive fossil verifications. The first strong evidence of existence of sharks was provided by the remains of the Devonian period. The original and the initial factual shark skeletons that were found intact were that of Cladoselache. Whole fossils of ray-finned bony fish were also found in the belly of few of these shark skeletons, with their direction being tail-first. This suggests that the various other sharks existing in the Devonian seas would have had to fight with the frightening armour-plated placoderm fish.

Around 360 million years ago, sharks expanded and flourished to such a stage that scientists have categorized this period as the 'golden age of sharks'. With the downfall of the gigantic reptiles, the mammals started to fill few of the vacated niches, and some come back to the sea. The developing whales, seals, dolphins, and sea cows turned out to be the major source of food for one cluster of sharks that is now considered to be the ancient relatives of the present-day, enormous white shark.

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History Of Sharks