The Goatfish has lots of personality as it uses the barbels below its mouth to dig into sand and rubble looking for food. They can quickly change their color if stressed and will often lie on the bottom waiting to be fed. These are excellent fish for fish-only tanks.Goatfishes are tropical marine fish of the family Mullidae. Goatfish are most associated with the reefs of the Atlantic, Indian, and Pacific Oceans.Many species of goatfish are conspicuously colored.Perhaps the goatfish's unpopularity among fishkeepers can be attributed to its feeding habits: Goatfish are tireless benthic feeders, using a pair of long chemosensory barbels ("whiskers") protruding from their chins to rifle through the sediments in search of a meal. Like goats, they seek anything edible; worms, crustaceans, mollusks and other smallinvertebrates are staples.By night the schools disperse and individual goatfish head their separate ways to loot the sands. Other nocturnal feeders will shadow the active goatfish, waiting patiently for any overlooked morsels. Goatfish stay within the shallows, going no deeper than about 110 meters. Some species, such as the freckled goatfish (Upeneus tragula) of East Africa, have been known to enter estuaries and rivers, although not to any great extent.