The god of wealth fish was originally named snakehead, also known as snakehead. Snakehead is also called snakehead, snakehead, snakehead, grouper and raw fish. In animal taxonomy, mullet belongs to the family Perciformes, which is widely distributed in all parts of China except the western plateau. Snakehead is delicious and nutritious, and has high economic and medicinal value. Mullet has the characteristics of fast growth, strong adaptability and disease resistance, wide source of fry and fast reproduction, and has high breeding value.

Physical characteristics of Cai Yu.

Generally, the body length of the wealth fish can reach 20 cm, and the weight varies from 500 grams to 1000 grams. The picture shows a cylindrical appearance with a thick and short tail handle. The head is long, the mouth is big, and the chin is a little prominent. The lateral line probably ends above the starting point of the gluteal fin, and one or two downward scales need to extend backward along the middle of the body. Cai Yu's body is dark gray, his abdomen is gray, and there are many scattered black spots.