biodiversity, Diversity, echinoderms, marine sponge, Coral Triangle, Seascapes, Echinoderm, porous, Featherstars, PNG, Reefs, Tropical, Reef, Invertebrate, Underwater, Marine, Coral Reef, Blue Planet, Feathers, Pacific, Asia, South East Asia, porifera, Featherstar, Papua New Guinea, crinoids, South-east-asia, pristine waters, Indo Pacific, Seascape, Invertebrates