orange-spine unicornfish (naso lituratus), also known as the masked unicornfish

animal aquarium coral fish acanthuridae pacific water tang unicornfish masked indian life marine exotic natural barcheek lituratus surgeon clown reef underwater aquatic fauna ocean one tank unicorn wildlife blue nature tropical wild beautiful sea acanthurus actinopterygii orange spine orangespine surgeonfish alive biology creature diving swim clear indopacific perciformes