Skillful identification of high quality fish species

Look at the specifications of fish species the specifications of the same kind of fish in the same pond should be neat and uniform, with little difference in body length and weight. On the contrary, the poor fish species with large individual gap and uneven quality often result in low overall survival rate due to predation, mixed germplasm, poor management and other reasons.

Look at the body color of the fish. The body color of the fish is bright and shiny. Different species and different culture methods have different body colors. Generally speaking, the back of high-quality silver carp species should be silver-gray, the side of the body and abdomen should be silver-white. The body color of high-quality grass carp is light golden yellow, and the grayish-black reticulated scales are more obvious, and the stronger the fish is, the more obvious the light golden yellow is. The body color of high-quality bighead carp is mostly light golden yellow, and the black markings are not very obvious. If the fish is dark or even black, it means that the fish is weak or diseased.

Looking at the activity of high-quality fish species, the action of high-quality fish species is lively and clustered, and when they are frightened, they quickly dive into the bottom of the water in groups, with strong grazing power and strong reverse water. when the fish are dense, they can only see the fish tail swinging continuously. On the other hand, the weak or diseased fish with poor physique move slowly, do not cluster, travel alone, have weak grabbing power and poor reverse water.

The fish species were randomly selected to check their advantages and disadvantages. The high-quality fish species beat violently when leaving the water, the individual is fat, the head is small and the back is thick, the body color is smooth, the muscle is moist, the scales and fins are intact, the Gill cover is not dilated, the tail is not bent, there are no parasites and scars on the body surface, and the body shape is normal and without deformity. On the contrary, weak fish or diseased fish jump weakly, scales and fins are incomplete, there is congestion, fish body is thin, head and tail is small, back is as thin as blade, even "no belly", "sticky net" and so on.