Male and female cat fish or goby fish are bought in order to produce baby fish. Fish breeding is realized with the help of artificial insemination. Anh Dương helps with techniques and loans for fish breeding. It is a real success as the farmer sells 100 000 small fish in just 5 months. For poor families, the selling price is 1 600 to 1 800 đ/small fish. It is a cheap price as on the market you will find the same fish from 2 000 to 2 200 đ/small fish.