Except when the batfish is actively trying to attract prey, the illicium is retracted into a cavity on the underside of the rostrum. The dorsal and anal fins are short, and the anal fin is located far behind the anus. The gill openings are on the body behind the base of the stalked pectoral fins. The tail is stout and terete, with a rounded caudal fin. The skin is rough, with pointed bony tubercles on the upper surface of the body and both surfaces of the tail.
Batfishes are true bottom fishes.
Their dark color and unusual flattened shape serve as camouflage, concealing them from predators and potential prey. They are ambush feeders, resting quietly and moving the lure to attract their fish and crustacean prey close enough to be captured. They also feed on snails, clams, and various kinds of worms. Batfishes are rather difficult to identify. There are nine genera and 62 species.