1. Arrange catfish spawning attachments in the spawning pond, and arrange bottom nests at the bottom of the spawning ovaries. After the catfish spawns, take out the ovaries and put them into the hatching pond in time to prevent the catfish from swallowing the eggs. Hazards of aquatic animals to fish eggs.

2. Generally, the water temperature is controlled at about 20 degrees, and catfish fry are 3-4 days old. It will burst out of the membrane, and the catfish fry that have just emerged from the membrane will be adsorbed on the fish nest and develop in still water or micro-flowing water.