Magnus Lundgren / Wild Wonders of China / Retracted elephant ear anemone (Amplexidiscus fenestrafer) Xiaoliuqiu Island, Taiwan

Magnus Lundgren / Wild Wonders of China / Elephant ear anemone (Amplexidiscus fenestrafer) Xiaoliuqiu Island, Taiwan

Gary Bell/ Oceanwide / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer), Great Barrier Reef, Australia

Georgette Douwma / Corallimorph (Amplexidiscus fenestrafer). Norht Sulawesi, Indonesia.

David Fleetham / Opening of Corallimorpharian / Disc anemone(Amplexidiscus fenestrafer), Komodo National Park, Indonesia.

Franco Banfi / Commensal shrimp (Pliopontonia furtiva) camouflaged on Disc anemone (Amplexidiscus fenestrafer) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Commensal shrimp (Pliopontonia furtiva) camouflaged on Disc anemone (Amplexidiscus fenestrafer) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Pascal Kobeh / Elephant's ear anemones (Amplexidiscus fenestrafer) Madagascar. Indian Ocean.

Pascal Kobeh / Elephant's ear anemones (Amplexidiscus fenestrafer) Madagascar. Indian Ocean.

Juergen Freund / Corallimorpharian / Disc anemone (Amplexidiscus fenestrafer), an intermediate between sea anemone and hard coral, on coral reef, Bali, Indo-pacific.

Georgette Douwma / Disc anemone (Amplexidiscus fenestrafer) the largest recorded species of corallimorph, Rinca, Komodo National Park, Indonesia

Fred Bavendam / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) pair among crinoids, Bali, Indonesia

Fred Bavendam / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) group, Bali, Indonesia

Chris Newbert / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) detail, Papua New Guinea

Norbert Wu / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) closely related to sea anemones, Raja Ampat Islands, Indonesia

Juergen Freund / Group of corallimorphia {Amplexidiscus fenestrafer} Great Barrier Reef, Australia

Juergen Freund / Group of corallimorphia {Amplexidiscus fenestrafer} Indo-pacific

Juergen Freund / Group of corallimorphia {Amplexidiscus fenestrafer} Great Barrier Reef, Australia

Juergen Freund / Corallimorpharia {Amplexidiscus fenestrafer} coral Sulu-sulawesi seas, Indo Pacific

David Fleetham / Corallimorpharian (Amplexidiscus fenestrafer), Indonesia.

Roberto Rinaldi / Ballon corallimorpharians (Amplexidiscus fenestrafer) sea anaemones, Tubbataha Reef, Phillipines.