Fan-bellied leatherjacket is a bizarre looking animal

There are many species of filefish, with varied appearances. This fan-bellied leatherjacket is member of the filefish family. It was found in the waters of Indonesia, searching the seabed for worms, tunicates, and shrimp. Like other filefishes, it has the capability of changing its colour and texture to match its surroundings. A master of camouflage, it is often found stationary in sea grass or coral, depending on this ability to blend in as a means of escaping predators.
The filefish has a spiky fin on the top of its head which it uses to warn other fish when it feels threatened. Often referred to as a "unicorn filefish" it resembles a unicorn when the spine is erect. They can grow up to 40cm (16inches) in length. These fish are beautiful to see and a delight for scuba divers to encounter.