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