Juergen Freund / Bean shaped polyps of an Anchor coral (Euphyllia ancora), a large polyp stony (LPS) coral. Misool, Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Hard coral polyps {Euphyllia ancora} Bunaken, Sulawesi, Indonesia

Georgette Douwma / Kaleidoscopic image of (Euphyllia ancora) polyps brown and green. Lembeh Strait, North Sulawesi, Indonesia.

Gary Bell/ Oceanwide / Hard Tube Coco Worm (Protula magnifica) filter feeding in Euphyllia Coral (Euphyllia ancora), Great Barrier Reef, Australia

Georgette Douwma / Cheek-bar cardinalfish (Apogon sealei) swimming over Euphyllia ancora coral. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Coral (Euphyllia ancora) polyps brown and green. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Tentacles of Coral (Euphyllia ancora) Lembeh, Sulawesi, Indonesia. Vulnerable species.

Claudio Contreras / Batasan Island, Danajon Bank, Central Visayas, Philippines, April

Norbert Wu / Euphyllia Coral (Euphyllia ancora) with polyps extended, Ambon, Indonesia

Georgette Douwma / Hard Coral (Euphyllia ancora) polyps. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Hard Coral (Euphyllia ancora) polyps. Rinca, Komodo National Park, Indonesia, October.

GEORGETTE DOUWMA / Hard coral (Euphyllia ancora) polyps. Bunaken, Sulawesi, Indonesia.