I have a herem of yellow damselfish, 5 females and 1 male. They spawn constantly. It is so neat to watch because they lay their eggs upside down and the male goes upside down to fertilize the eggs. He protects his eggs and cleans them often. Sometimes the females come to lay more eggs and he chases them off. I'm not trying to raise them for profit. I leave the eggs alone and let things take place.