Schooling threadfin butterflyfish (Chaetodon auriga), in Rarotonga Lagoon, The Cook Islands, South Pacific, Pacific

abundance actinopterygii animal animal themes animals in the wild aquatic beautiful beauty beauty in nature butterflyfish chaetodon chaetodon auriga chaetodontidae chordata color image cook islands day fauna fish group of animals group of fish horizontal ichthyology large group of animals marine biology new zealand no people ocean ocean life outdoors perciform perciformes percoidei photography profile rarotonga school of fish schooling sea sea life shoal side view swimming threadfin butterflyfish togetherness tropical fish undersea underwater vitality water wildlife zoology