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The living habits and morphological characteristics of the cock-billed carp (Yunnan longan carp)

2023-03-29 06:03:54 68

Cyprinus (Cyprinus) ilishaestomus) belongs to the order Cypriniformes, Cypriniidae, Cyprin subfamily, and Cyprinus genus. English name: Top-mouth carp.


Endangerment level: Endangered.


The body shape is like a carp. The back of the head is significantly bulged. The head tip is long, and the head length is longer than the body height or the base length of the dorsal fin. The snout is long and pointed, with a significant bulge in front of the nostrils. In the supraoral position, the lower jaw protrudes in front of the upper jaw, and the top of the oral cleft is above the horizontal line of the middle eye. No need. The eyes are larger. The scales are larger, with 36-39 lateral line scales. Both the dorsal and anal fins have hard spines with fine teeth on the trailing edge; the starting points of the dorsal and pelvic fins are almost opposite, and the outer edge of the dorsal fin is obviously concave; the pectoral and pelvic fins are both large. The crown of the second main row of hypopharyngeal teeth has 2-4 grooves. The back is yellow-green, the sides of the body are gradually lighter, and the abdomen is silvery white. The pectoral fins are slightly gray and the other fins are light yellow. There is a small crescent-shaped spot on the back of the scales on the side of the body.

Mainly inhabits deep water where there are many aquatic plants. Omnivorous, staple food is shrimp and small fish, and also eats aquatic plants. The individual is larger, with a general body length of 170-300 mm.


The cock-billed carp is endemic to my country and is only distributed in Qilu Lake, Yunnan.


The cock-mouthed carp was originally a common commercial fish in its origin. In the late 1970s, due to unscientific development of the lake, the natural ecological environment of the lake area deteriorated, the lake surface shrank, the water level dropped, serious pollution occurred, the ecological balance was imbalanced, a large number of aquatic plants died, and the habitat and spawning environment of the cock-mouthed carp were destroyed. This caused a sharp decline in resources and is now almost extinct.


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