Pomacentrid larvae hatch from a clutch of 50 to 2500 eggs, depending on the species. For some the planktonic stage may last only a day while others drift in the open ocean for a few weeks. Juveniles settle in reef areas and their coloration can be quite different from that of adults of the same species. In anemonefishes (Amphiprion and Premnas) one sexually active pair is dominant over a group of juveniles. The young grow slowly in this situation and do not reach sexual maturity until they can replace one of the dominant fish.