; subclass Actinopterygii, order Perciformes)
A small family of marine or freshwater fish, that have an eel-like body, very small eyes, very long dorsal and anal fins, and a rounded tail fin. The pelvic fins usually form an adhesive disc under the head. There are about 18 species, found in the tropical regions of the Indo-Pacific, America, and W. Africa.
Subjects: Zoology and Animal Sciences.