The satanic leaf-tailed gecko sports, like its name suggests, a tail in the shape of a leaf. (Its satanic tendencies, however, remain unconfirmed.) The Madagascar lizard has a "twisted body, veined skin and tail which looks remarkably like it has been nibbled at by insects or rotted by decay, all help this reptile blend into the foliage of its habitat" according to conservation group ARKive.
5. The Cichlid: Chilling Like A Rotting Carcass