 Chrominae are closer on the phylogenetic tree to Pomacentridae than Amphiprioninae, but are able to be differentiated from Pomacentridae because Chrominae are very brightly colored with blues and purples while Pomacentridae are confined to mainly brown with some blues.These three families are all coral reef fishes, and there is usually a lot of variation and overlap from subfamily to subfamily.Damselfish have been documented in the fossil record for at least 50 million years.