black hawaiian dascyllus swimming by a coral reeef

adaptation adapted albisella alive animal aquatic biodiversity black colonies colorful coral damsel dascyllus domino ecology eukaryotic evolution exoskeleton filter filtering finned fins fish gill gillbearing hawaiian invertebrate living marine movement multicellular ocean pacific photosynthesis polyps reef salt saltwater scales sea sessile spines squamate swim tail tentacles vertebrate water white whitespotted