Green algae (Caulerpa racemosa) and black durgon (Melichthys niger), schooling, St. Peter and St. Paul's rocks, Brazil, South America

underwater green algae caulerpa racemosa fish black durgon melichthys niger swimming schooling brazil atlantic ocean day outdoors nature natural world marine life fishes sea seas ocean oceans atlantic algae st peter and st pauls rocks south america black durgons black triggerfish black triggerfishes horizontal