ganoid
/ˈɡanɔɪd
/Zoology
adjective
1(Of fish scales) hard and bony with a shiny enamelled surface. Compare with ctenoid and placoid.They also possess a heterocercal caudal fin and remnants of ganoid scales; both are uncommon among extant actinopterygians....
- Gar species in North America are easily recognized by their long snouts, sharply toothed jaws, non-overlapping and diamond shaped ganoid scales, and posterior placement of dorsal and anal fins on the body.
- This species has specialized scales, which are called ganoid scales, and it has nostrils or nares on tentacles that protrude from the head.
1.1(Of a fish) having ganoid scales.The purpose of this research is to study ganoid fish taphonomy, specifically, how each type of fish decomposes, including anatomical location and extent of postmortem damage, and possibly, its cause.
noun
A primitive fish that has ganoid scales, e.g. a sturgeon or freshwater garfish.In the collection of ganoids the most complete is representation of Acipenseriformes, mainly of acipenserids proper....
- In the ganoids the upper lobe of the tail fin is the largest.
- The ganoids had already reached their evolutionary climax in the Permian and Triassic, some 270-190 million years ago; today they are few in number when compared with the dominant bony fishes.
Origin
Mid 19th century: from French ganoïde, from Greek ganos 'brightness'.