Percocypris tchangi

The Latin name of Zhang's perch is Percocypris tchangi, and the specific epithet is taken from the surname of Zhang Chunlin, a famous Chinese ichthyologist.

There was considerable controversy over the classification of Percocypris species, and this species was once considered a synonym of Percocypris pingi retrodorslis. In 2013, researchers Yang Junxing, Wang Mo, and Chen Xiaoyong from the Kunming Institute of Zoology, Chinese Academy of Sciences, combined the results of molecular systematics and morphological analysis to revise the classification system of the genus Carp, considering Zhang's Carp and Houbei Carp as valid independent species.

Listed in the second level of China's "National Key Protected Wildlife List" (February 5, 2021).

Protect wildlife and eliminate game.

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Distributed in the Lancang River and Nujiang River systems in China.

The body is elongated and laterally flattened. The back of the head is slightly raised, and the dorsal margin is slightly arc-shaped. The head is long, the snout is slightly wide and flat, and the snout length is less than the head length behind the eyes. The snout skin ends at the base of the upper lip and is separated from the upper lip. There is no obvious notch at the front edge of the preorbital bone. The lips are relatively thick and wrapped around the outer surface of the jaws. The upper and lower lips are enlarged on both sides; the upper and lower lips are connected at the corners of the mouth, and the posterior groove of the lips is deep, extending forward to the chin. The mouth is subsuperior, forming an oblique fissure, the lower jaw is slightly protruding, and the end of the upper jaw extends below the front edge of the eye. There are fine keratin particles on the inner side of the upper and lower jaws. There are two pairs of whiskers, which are well developed. The whisker