Shockingly, eels are one of the most shocking creatures on Earth. They have a slimy, snake-like body and can grow up to four meters in length. Eels are found in both fresh and salt water, and they can even survive out of water for short periods of time. They are carnivorous and feed on small fish, crustaceans, and other invertebrates. Eels are also capable of producing electric shocks to stun their prey.