The Ephippidae are a family containing the spadefishes, with about eight genera and a total of 20 species, mostly marine. The most well-known species are probably those in the reef-dwelling genus Platax, the batfishes, which are kept as aquarium fish. They are spade-shaped and laterally compressed, and have very symmetrical, triangular dorsal and ... Found on http://en.wikipedia.org/wiki/Ephippidae