Alex Mustard / Split level image of Leather corals (Sarcophyton sp.) flourishing in shallow water close to uninhabited coral islands. Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean...

Alex Mustard / Colourful reef scene with Leather corals (Sarcophyton sp.), Soft corals (Dendronephthya sp.) Seafans (Melithea sp.) and fish, including Magenta slender anthias (Luzonichthys waitei) and Scalefin anthi...

Juergen Freund / Mushroom leather coral (Sarcophyton sp) Bali, Indo-pacific.

Chris Newbert / Hawksbill Sea Turtle (Eretmochelys imbricata) and Leather Coral (Sarcophyton sp) on reef, Indonesia

Chris Newbert / Feather Star (Colobometra perspinosa) on Sea Fan (Melithaea sp) and Leather Coral (Sarcophyton sp) 70 Feet Deep, Solomon Islands

Michael Pitts / Mushroom leather coral feeding at night, Yap. Micronesia.

Pascal Kobeh / Greasy grouper (Epinephelus tauvina) sheltering in Mushroom leather coral (Sarcophyton sp). Flores Sea, Indonesia.

Pascal Kobeh / Soft corals (Sarcophyton sp.) with the polyps open, Sulu Sea, Philippines.

Linda Pitkin / Leather coral (Sarcophyton sp.), on a rock with soft corals and Yellow Sea Cucumbers (Colochirus robustus), Triton Bay, near Kaimana, West Papua, Indonesia

David Fleetham / Warted egg cowries (Calpurnus verrucosus) are pictured on Leather coral (Sarcophyton sp), on which they feed. Komodo, Indonesia.

Alex Mustard / Solar powered nudibranch (Phyllodesmium longicirrum) feeding on a Mushroom leather coral (Sarcophyton sp.). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea

Franco Banfi / Mushroom leather coral (Sarcophyton sp) Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines