Jeff Rotman / Symbiotic shrimp on basal disc of sea anemone, Red Sea

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

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

Georgette Douwma / Disc anemone / corallimorph (Discosoma sp) Rinca, Komodo National Park, Indonesia