Pomacentrus vaiuli, 'princess damsel'
‘princess damsel ‘
Cleaner fish eat off parasitic crustaceans (copepods) from fish, that is why fish deliberately seek them out and sit still for them as they clean. But scientists have discovered that the cleaner fish don’t eat all the parasites off of this damselfish, they leave the smaller ones and in doing so, ensure that the fish has to come back later. In a way this damselfish (as well as others) is a farm, a living, breathing, moving, farm for the cleaner fish to raise big juicy crustaceans - (58).