I have never heard of marine fish, but I know something about tilapia. Tilapia, commonly known as African crucian carp, belongs to Perciformes, Perciformes, Cicadellidae and Tilapia (also known as Sparidae, Sparidae). The genus is native to Africa, with more than 600 species, and currently cultivated 15 species. Tilapia is a small and medium-sized fish. Its shape and individual size are similar to those of crucian carp, and its fins are as varied as mandarin fish. Broad-salt fish can live in both seawater and fresh water; Resistant to hypoxia, generally inhabiting the lower layer of water, but inhabiting the water layer with the change of water temperature or fish size.

Tilapia has a wide range of eating habits, mostly plant omnivores, very greedy and eat a lot; It grows rapidly, especially in its infancy. The growth of tilapia is closely related to temperature. The growth temperature is 16 ~ 38℃, and the optimum temperature is 22 ~ 35℃.

Tilapia was first introduced from Singapore to Taiwan Province Province in China in 1965 by Wu and Guo Qikun. In memory of these two people, it was first called "Wu Guoyu". 1957 was introduced to China from Vietnam, also known as "Vietnamese fish". Because it is native to Africa and looks like a local crucian carp, some people call it "African crucian carp".

There are two kinds of tilapia introduced from Yingshan Hot Spring in Hubei Province: one is called Mozambican tilapia, and 1972 was received from jingshan county; The other is Nile tilapia, 1979 was introduced from Hubei Fisheries Research Institute. After they settled down, they all lived well.