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The megamouth shark (Megachasma pelagios) is one of the most mysterious and least understood of all the sharks. It was first recorded in 1976 and is so different from other shark lineages that it has been placed in its own family: Megachasmidae. Megamouth sharks can reach over 5 metres in length; the head is large with a short snout and, as the name would suggest, an extremely large mouth. The mouth contains over 50 rows of very small, hooked teeth.

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The mouth of a basking shark (Cetorhinus maximus) is the second-largest living fish, after the whale shark, and one of three plankton-eating sharks besides the whale shark and megamouth shark.

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The megamouth shark, Megachasma pelagios, is an extremely rare species of deepwater shark. Since its discovery in 1976, only a few megamouth sharks have been seen, with 54 specimens known to have been caught or sighted as of 2012. Like the basking shark and whale shark, it is a filter feeder, and swims with its enormous mouth wide open, filtering water for plankton and jellyfish. (:54)

Megamouth Shark - Information & Pictures of Megamouth Sharks