Reefs, PNG, vertebrates, Chondrichthyes, Sharks, Underwater, Pacific, Shark, Marine, Blue, shark finning, biodiversity, Blue Planet, Shark Fin Soup, top of the food chain, predatory, Tropical, species decline, Coral Triangle, Swimming, Seascapes, Papua New Guinea, Diversity, WWF submission, South East Asia, elasmobranch, Seascape, pristine waters, Asia, Reef, South-east-asia, predator, Coral Reef, Indo Pacific