Angelfish show some obvious signs before spawning, which can help breeders determine whether they are about to enter the breeding state.
First of all, angelfish will pair up on their own during the breeding period. Usually, a male and a female fish will stay closely together. If you notice two angelfish always moving around together, it indicates that they are about to start breeding. Secondly, angelfish will choose an area they consider safe as the spawning site and clean the area with their mouths to ensure a clean environment. The two fish will guard this area together and drive away other fish that approach. In addition, the ovipositor of angelfish will droop and the anus will become more prominent when they are about to breed.
To successfully breed angelfish, breeders need to provide them with a quiet and comfortable environment and prepare a spawning board. Angelfish usually spawn once every half month, and the number of eggs laid each time ranges from 200 to 1,200. The female fish will lay eggs on the spawning board, and then the male fish will fertilize them. After spawning, the parent fish will fan the water with their pectoral fins to ensure that the fertilized eggs have enough oxygen. The unfertilized eggs will be pecked away by the parent fish to keep the hatching environment clean.