Red line fish is also called golden line fish, not sea fish; Silurus meridionalis mostly lives in still lakes with wide water surface, usually at the outlet of the lake or in deep water, and spawns and hatches in caves with spring water in shallow water near the lake or at the outlet of the lake during the breeding season.

The reproductive period is from 65438+February to the following February, and the eggs are laid in gravel. Young fish mainly eat zooplankton and aquatic insects, but also eat a small amount of algae and higher plant fragments; Adult fish turn to shrimp and small fish and eat zooplankton.

Silurus meridionalis is a unique fish in China, which is common in lakes in eastern Yunnan, with Yangzonghai and Dianchi Lake as the most. In Bama, Guangxi (the hometown of longevity), a golden catfish with small eyes was found in the cave, because the environment here is suitable for its growth.

Extended data:

The whole body is translucent, pink, with blood vessels and coccygeal vertebrae, duckbill shape, small eyes and long whiskers. Living in the dark all the year round, the golden catfish degenerated into a blind fish with only eye marks.

Its existence is of great significance to the integrity and diversity of biological species gene pool, and provides a reliable physical basis for the study of biological species diversity of underground rivers in karst areas, with extremely low reproductive capacity.

In recent years, due to reclamation around the lake, water pollution, careless introduction, overfishing and other reasons, most of the original fish caves along the lake have been blocked, and the destruction of habitat has led to the depletion of its population resources. Now it can only be seen occasionally in lakes such as Dianchi Lake.