Spadefishes, batfishes and knightfishes are members of the Ephippidae family. They are primarily found in marine waters of Atlantic, Indian, and Pacific oceans in a variety of shallow-water habitats, estuaries and coral reefs. Most species are compressed laterally and deep-bodied. They are omnivores feeding on algae, small fishes and vertebrates.
Worldwide, there are 8 genera and about 15 species. Malaysia is represented by 7 species.