A true master of disguise, the mimic octopus was only discovered as recently as 1998. Not only does it mimic its surroundings but it is expert at impersonating other creatures. It pretends to be a crab to attract suitor crabs, which it then eats. It pretends to be a poisonous lionfish to discourage predators. Faced with an aggressive damselfish it hides in a hole with two arms poking out at either end mimicking a venomous snake. This is one smart octopus.