2. The abdomen is different: the abdomen of mature female loach is swollen, full and transparent, and the reproductive Kong Zi is red, round and everted. The abdomen of male loach is very small.
3, the size is different: the male loach is bigger than the female loach, and the fish is sickle-shaped when it is still. Another notable feature is that the male loach has a fleshy protuberance on both sides of its tail.
Extended data
Misgurnus anguillicaudatus is a kind of benthic fish, which likes to live in still water or slow-flowing water with mud at the bottom, such as lakes, ponds, paddy fields, ditches and reservoirs, and likes neutral or slightly acidic cohesive soil. The suitable domestic water temperature is 10-32℃, and the optimal water temperature is 22-28℃.
When the water temperature is lower than 10℃ or higher than 30℃, the activity of loach is obviously weakened; When the water temperature is lower than 5℃ or higher than 35℃, dive into the mud to stop activities. In winter, the loach burrows into the mud for 20-30 cm to overwinter, and comes out when the water temperature reaches 10℃ in the following spring.
Misgurnus anguillicaudatus moves in the bottom mud or the bottom mud of water, preferring to lie in the daytime and go out at night, and its vision is reduced in a dark environment for a long time. However, tentacles and lateral lines are very sensitive and play a key role in avoiding enemies and foraging. Misgurnus anguillicaudatus not only breathes through gills, but also breathes through intestines, so it has strong tolerance to low dissolved oxygen.