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Life habits and morphological characteristics of subtropical horsemouth fish

2023-03-29 05:22:18 116

Parazacco spilurus belongs to the order Cypriniformes, family Cyprinidae, ("fish" on the left, "dan" on the right) subfamily, and the genus Parazacco spilurus. English name: Predaceous chub.


Endangerment level: Vulnerable.


The body is long and flat on the sides, the abdomen is narrow, and there is an obvious ventral rib from the base of the pelvic fin to before the anus. The head is small and the snout is pointed. The mouth is in a superior position, the oral cleft slopes downward, and the mandible is significantly longer than the maxilla; there is a significant hook-shaped protrusion at the front of the mandible that matches the depression of the maxilla, and the lateral edges of the upper and lower jaw are slightly wavy and connected with each other. No need. The eyes are larger. Lateral line scales 44-46. The lateral line curves downward significantly above the pectoral fin, and then rises to the middle of the body after entering the caudal peduncle. The dorsal fin is short, without spines, and its starting point is behind the starting point of the pelvic fin; the anal fin is well developed, and the longest fin can extend to the base of the caudal fin. The back of the body is grey-brown, the belly is white, and the sides of the body are brownish-red with irregular vertical markings. The head and ventral surface are red, and the tail base has a black round spot.

Living in mountain streams in subtropical areas, it has high requirements for the habitat. . Likes to be active in clear water bodies. They usually swim and forage in small tributaries and streams of rivers.


Yili is distributed in rivers in southern Guangdong, the Jiulong River and Zhanghe River systems in Fujian, and some rivers in Hainan Island; it is also distributed in some parts of Vietnam abroad.


The distribution area of this species is narrow and the population is small. Due to the construction of dams on some rivers in the distribution area, the hydrological conditions of the original mountain streams have been changed, the ecological environment has been changed, and the lives of the Yili group have been affected. In addition, the phenomena of poisoning, explosion, and electricity in the mountain streams have been very serious, reducing the originally small number. The number of large groups is still decreasing.

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