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 / 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.

Constantinos Petrinos / Tube worm (Sabellidae) on hard coral (Euphyllia ancora) Sulawesi

Doug Perrine / Acoel flatworm {Waminoa sp} commensal on tentacles of Hard coral {Euphyllia glabrescens} Gato Island, Cebu, Philippines

Juergen Freund / Colonial hard coral {Euphyllia ancora} Papua New Guinea

Birgitte Wilms / Hard Coral (Euphyllia paraencora) polyps, 60 feet deep, Solomon Islands

Norbert Wu / Euphyllia Coral (Euphyllia ancora) a type of stony coral with distinctive polyps, Papua New Guinea

Juergen Freund / Coral {Euphyllia ancora} Pacific, Philippines

Juergen Freund / Tentacles of coral (Euphyllia glabrescens) Indo-Pacific