; subclass Actinopterygii, order Perciformes)
A small family of marine fish (sometimes included in the Stromateidae) that have oval bodies, large eyes, two separate dorsal fins, and forked tail fins. Species such as Nomeus gronovius (man-of-war fish) and Psenes arafurensis (eyebrow fish) are sometimes found swimming among the tentacles of Physalia physalis (Portuguese man- of-war, see Rhizophysaliina). There are about 15 species, found in tropical and subtropical seas.
Subjects: Zoology and Animal Sciences.