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; subclass Actinopterygii, order Salmoniformes)

A family of freshwater and brackish-water fish that have an elongate body and a single dorsal as well as an adipose dorsal fin. The Australian grayling, Prototroctes maraena, and the Derwent whitebait, Lovettia sealii, ascend the rivers in order to spawn. Other species occur in S. America.

Subjects: Zoology and Animal Sciences.

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