(subclass Actino-pterygii, order Perciformes)
A family of marine fish that have a single dorsal fin (the soft-rayed part of the dorsal and anal fins being covered in scales), and a protractile mouth. Labracoglossa argentiventris is a common species in Japanese waters and grows to about 25 cm. There are about five species, found in the western Pacific.
Subjects: Zoology and Animal Sciences.