Reefs, Osteichthyes, PNG, School of fish, South East Asia, perciform fish, Papua New Guinea, biodiversity, Fish, solidarity, swarm, Coral Reef, Asia, Schooling, South-east-asia, vertebrates, Marine, Blue Planet, batfish, Shoal, Social Behaviour, Diversity, Blue, pristine waters, Seascapes, Tropical, Underwater, Coral Triangle, Seascape, Reef, Indo Pacific, Pacific