A Ctenocella species octocoral sea fan, surrounded by an assortment of hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives

ctenocella sea fan octocoral hard corals coral reef gaafu dhaalu maldives marine ecosystem underwater biodiversity habitat ocean growth health life aquatic fish invertebrates soft tropical colors balance species biology conservation diversity exploration coastal waters creatures identification landscape reefs deep environment