Filefishes or leatherjackets are members of the Monacanthidae family. They are found in the Atlantic, Indian and Pacific oceans. They inhabit shallow coral and rocky reefs, seagrass beds, and trawling grounds in depths of 10 to over 200 meters. The filefishes are recognized by their first dorsal fin that consist of a prominent spine which can be locked upright by a second very small spine.
Most of the filefishes species feed on a wide variety of benthic invertebrates, but some specialize on corals or zooplankton. Some species are schooling, but most are found as individuals or in pairs.
There are 28 genera and about 110 species of Monacanthidae worldwide. Malaysia has about 20 species.