Acanthopterygii n. pl. : An order of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch.

Example:


Taxonomy
Acanthopterygii, free encyclopedia, superorder, order Perciformes, ITIS, suborder, ray-finned fishes, the seahorses, fishes, search, Kingdom, Phylum, Infraclass, spiny, finned, characteristic, rays, fins.

Defination from the web:
Acanthopterygii. Orders. See text. Acanthopterygii (meaning "spiny finned one") is a superorder of bony fishes in the class Actinopterygii. ... Tree of Life: Acanthopterygii. This fish-related article is a stub. You can help Wikipedia by expanding it. v • d • e ...