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7.The Electric Eel:
Despite its name, the electric eel is not in any way related to the eels we know of. It is a type of knife fish that closely resembles the catfish. It has a cylindrical and dark body and grows up to 2 meters long. The electric eel produces electricity for self-defense. It also uses it to attack. The 600 volts is not little, you need to be careful to avoid it.