Pomacentrinae
The species within the Pomacentrinae have orb-like to partly long bodies and they do not have spiny caudal rays projecting out of the caudal peduncle. The majority of species asre territorial and they defend their feeding territory from members of their own species and other species which compete with them for food. They feed on algae, which they appear to farm, actively increasing the algal productivity within their territories. Many species lay demersal eggs, which are guarded and fanned by the male. One species, the freshwater demoiselle Neopomacentrus taeniurus is known to enter rivers and even reaches into the lowest stretches of streams.