ganoid

One of the Ganoidei, a disused taxonomic grouping of fishes, including the bowfin, gars, and sturgeons.

Having a smooth, shining surface, as if polished or enameled: specifically applied to those scales or plates of fishes which are generally of an angular form and composed of a bony or hard horny tissue overlaid with enamel.

Having ganoid scales or plates, as a fish; specifically, of or pertaining to the Ganoidei.