David Shale / Deepsea Hermit crab with zoanthid (Epizoanthus sp) on shell, from a coral seamount in the Indian Ocean, November 2011

Georgette Douwma / Kaleidoscopic image of Zoanthid anemones (Protopalythoa sp), Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Kaleidoscopic image of Zoanthid anemones - Protopalythoa sp. (?), Lembeh Strait, North Sulawesi, Indonesia.

Linda Pitkin / Green finger sponge (Iotrochota birotulata), with colonies of Golden zoanthids (Parazoanthus swiftii), on Netted barrel sponge (Verongula gigantea), on coral reef Klein Bonaire, Bonaire, Leeward Antil...

Sue Daly / Close-up of a group of Yellow cluster anemones (Parazoanthus axinellae), Sark, British Channel Islands, UK, August.

Sue Daly / Close-up of a group of Yellow cluster anemones (Parazoanthus axinellae), Sark, British Channel Islands, UK, August.

Sue Daly / Yellow cluster anemones (Parazoanthus axinellae) with a Bloody Henry starfish (Henricia oculata), Sark, British Channel Islands, UK, August.

Solvin Zankl / Yellow encrusting anemone (Parazoanthus elongatus) and Chilean blue mussel (Mytilus chilensis) Comau Fjord, Patagonia, Chile Pacific Ocean

Solvin Zankl / Yellow encrusting anemone (Parazoanthus elongatus) about 7cm size, Comau Fjord, Patagonia, Chile, Atlantic Ocean

Richard Robinson / Yellow zoathhid anemone (Parazoanthus elongates) in Doubtful Sound, Fiordland National Park, New Zealand.

Richard Robinson / New Zealand crayfish or southern rock lobster (Jasus edwardsii) hides under the yellow zoathhid anemone (Parazoanthus elongates) in Doubtful Sound, Fiordland National Park, New Zealand.

Sue Daly / Yellow Cluster Anemone (Parazoanthus axinellae) Guillaumesse, Sark, British Channel Islands.