Inhabits lagoon and seaward reefs (Ref. 9710). Each group of fish consists of a breeding pair and 0-4 non-breeders. Within each group there is a size-based hierarchy: the female is largest, the male is second largest, and the non-breeders get progressively smaller as the hierarchy is desceded. If the female dies, the male changes sex and becomes the breeding female, while the largest non-breeder becomes the breeding male. The maintenance of size differences may avoid conflicts, because subordinates do not become a threat to their dominants (Ref. 47841). Appears to occur in shallower depths than A. ocellaris. This species has been reared in captivity (Ref. 35404, 35413, 35420). Associated with the anemones: Heteractis crispa, Heteractis magnifica, and Stichodactyla gigantea (Ref. 5911).