Shoal of Powder Blue Tang, Acanthurus leucosternon, Thaa Atoll, Maldives

powderblue surgeonfish acanthurus leucosternon surgeonfish surgeonfishes fish fishes acanthuridae thorn tail tang tangs perciformes shoal school schooling swarm group groups behavior blue indian ocean asia geography nature sea ocean sealife marine wildlife marine fauna underwater underwaterphoto underwaterpicture underwaterphotography underwaterworld shoal of powder blue tang acanthurus leucosternon thaa atoll maldives vertical rm