1(Of fish scales) hard and bony with a shiny enamellike 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.
A primitive fish that has ganoid scales, e.g., a bichir, 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.
Mid 19th century: from French ganoïde, from Greek ganos 'brightness'.
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