Chiselmouth

Species of fish

The chiselmouth is an unusual cyprinid fish of western North America. It is named for the sharp hard plate on its lower jaw, which is used to scrape rocks for algae. It is the sole member of the monotypic genus Acrocheilus and is a close relative of the Gila western chubs, and is known to hybridise with Ptychocheilus oregonensis.

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