Water fish can be released into the river, but there must be water fish locally. Water fish is also called soft-shelled turtle and ball fish, and its scientific name is soft-shelled turtle. It is an amphibian, with more than 20 species in China. This kind of fish mainly lives in lakes, ponds, reservoirs and slow-flowing rivers. Therefore, when releasing it, we must pay attention to the location, not put it in big rivers, but only in small rivers, and we must find out whether there is this species in the local area in advance, so as not to cause species invasion.

1. Carp: Carp is a common fish, native to Asia, and likes to live in calm ponds, lakes and rivers with overgrown aquatic plants. It is widely distributed in China, so it is not a big problem to release it. Don't pay attention to the fact that you must choose a suitable place when it happens, and don't release it into a fish pond with artificial fish culture.

2. Grass carp: Grass carp is a kind of freshwater fish, which usually lives in rivers and lakes in plain areas. It is lively, lives in the middle and lower layers of water bodies, and feeds on aquatic plants. It is also widely distributed, and can be seen except Tibet and Xinjiang, so the problem of releasing it is not very big.

3. Carassius auratus: Carassius auratus is one of the most common freshwater fish in China, and it is found in all major water systems except Qinghai-Tibet Plateau. As an omnivorous fish, it has strong suitability, fast growth and low requirement for water temperature, so it can be released.