ganoid

(of fish) possessing ganoid scales, typified by a hard shiny layer of ganoine (an enamel-like substance) and the fact that they increase in thickness by adding layers all round, ganoine above, laminated from below. Compare COSMOID, PLACOID.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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References in periodicals archive

scorpius are rather similar in size to those of these other actinopterygians but the underlying tissue is different, as the teleost scales consist of laminated bone, while the polypteriform and lepisosteiform fishes have ganoid scales with hard, multilayered, enamel-like ganoine in their upper part.

The morphology and sculpture of ossicles in the Cottidae (Teleostei) of the Baltic Sea/Laanemere kolme voldaseliste (Teleostei) perekonna luuliste elementide morfoloogia ning skulptuur

Gar have heavy, interlocking ganoid scales, but a cousin, the bowfin, or mudfish, is nearly as ancient and lacks hard, armored scales.

In the scales

When the 30 or so fish species found on Ganoid Ridge above Wapiti Lake were alive and swimming, B.C.

Monster from the deep: it swam through murky seas some 220 million years ago, spreading terror down the food chain. Over twice as big as Tyrannosaurus Rex, the marine reptile excavated in the northern Rockies was perhaps the largest predator ever to inhabit the Earth

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