How to breed fish fry in pond corner?

Hehe, the antonym of fry is quite complicated, so let's talk about it briefly.

One is natural reproduction, that is, the selected parent fish are mixed in proportion, put into the pond, and the fish nest is tied (palm skin disinfection, etc.). ) and other fish lay eggs in estrus and hatch naturally, which has the advantages of low cost and low efficiency.

Two: Injecting HCG into fish on the basis of natural opposition can improve efficiency.

Third, timely inject chorionic gonadotropin into the sexually mature parent fish, so that the fish can lay eggs in the fish nest and then hatch in the incubator.

Fourthly, the sperm eggs of the extruded mature parent fish are artificially fertilized and then hatched in the loop.

... the next video makes it very clear.