The spotted ratfish, Hydrolagus colliei, is a chimaera found in the Atlantic, Pacific, and Indian oceans. This unique shark relative gets its characteristic name from a pointed rat-like tail. The ratfish lays leathery egg cases on the bottom of sandy/mud areas which are often mistaken by divers as something inanimate.
This unusual fish has smooth skin and large green eyes with a rabbit-like face. Ranging in depth from 40 - 3000 feet, these fish survive on a diet of shrimp, worms, small crustaceans, clams and small fish, which they grind and eat with a plate-like mouth very similar to that of a skate. They also have a venomous spine located on the front of their dorsal fin. It is also considered to be the missing link between the cartilaginous and bony fish, since the ratfish contains both.