Sea Dragon

The sea dragon is a close relative of the sea horse. It can be found on the cool rocky reefs of southern and western Australia. While technically a fish, the sea dragon does not swim so much as sway as it imitates the movement of the seaweed and seagrass among which it makes its home. The sea dragon possesses leaflike fins and appendages that are nearly transparent, and a tube-like mouth that it uses to suction in the larval fishes and small shrimp-like crustaceans that it feeds on.

by www.livescience.com