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Better not get in its way. Called Electric Eel, but is in fact not an eel at all but a knifefish. It can produce a shock of up to 500 volts (might even reach 600) and 1 ampere of current (500 watts). It is totally blind and uses electric signals to communicate, and of course to catch its prey. Usually about 1 meter long, but can be up to 2.5 m.