Ganoidei, order Ganoidei(noun)

a group of mostly extinct primitive bony fishes characterized by armor-like bony scales

Ganoidei(u)

one of the subclasses of fishes. They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma. Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales