Close-up view of a Hawksbill sea turtle next to a red sea fan on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Close-up of giant sea fan coral (Gorgonian fan coral) (Annella mollis), Ras Mohammed National Park, off Sharm el Sheikh, Sinai, Egypt, Red Sea, Egypt, North Africa, Africa

Reef scene with sea fan, Komodo, Indonesia, Southeast Asia, Asia

Giant sea fan (Gorgonian fan coral) (Annella mollis), Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

Fan Worm on red Sponge, Spirographis sp., Caribbean Sea, Dominica

Giant sea fan coral (Gorgonian fan coral) (Annella mollis), Ras Mohammed National Park, off Sharm el-Sheikh, Sinai, Red Sea, Egypt, North Africa, Africa

Fan Worm on red Sponge, Spirographis sp., Caribbean Sea, Dominica

Splendid knotted fan coral (Acabaria splendens), Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

Silhouette of three scuba divers above giant sea fan (Annella mollis), Ras Mohammed National Park, Red Sea, Egypt, North Africa, Africa

A gorgonian sea fan (possibly Echinogorgia species) octocoral on a tropical coral reef, in Gaafu Dhaalu atoll, The Maldives, Indian Ocean, Asia

Close-up of red sea fan, member of the octocoral family, Subergorgia species, Fiji, Pacific

Gorgonian sea fan, possibly Astrogorgia sp., Ulong channel, Palau, Caroline Islands, Micronesia, Pacific Ocean, Pacific

Cryptic teardrop crab (Pelia mutica), Nice red crab sitting on cream sea fan with black background, Honduras, Caribbean.

Comanthina Crinoid (Comantheria briareus) black & white in colour and hanging down on brilliant red Sea Fan, Sipidan, Mabul, Malaysia.

Glass fish in cave (Parapriacanthus guentheri), large school of fish swimming behind red coral sea fan with dark background,Mabul, Borneo, Malaysia, South China Sea

Gorgonian sea fan, Sipadan, Sabah, Malaysia, Borneo, South-east Asia

Comanthina Crinoid (Comantheria briareus) black & white in colour and hanging down on brilliant red Sea Fan, Sipidan, Mabul, Malaysia.

A Diver observing a Giant sea fan (Annella mollis) and the Glass fish (Parapriacanthus ransonneti) that have used its cover as a safe haven. Sharm El Sheikh, South Sinai, Red Sea, Egypt.

A Diver observing a Giant sea fan (Annella mollis) and the Glass fish (Parapriacanthus ransonneti) that have used its cover as a safe haven. Sharm El Sheikh, South Sinai, Red Sea, Egypt.

Colourful coral reef with soft corals Dendronephthya.

Coral block with different stony corals (Scleractinia), Melithaea gorgonian (Melithaea sp.), Feather star, yellow (Crinoidea) and Sabre squirrelfish (Sargocentron spiniferum), three, Great Barrier Reef, Coral Sea, Pacific, Australia, Oceania

Giant sea fan (Annella mollis) on steep wall, St Johns Reef dive site, Saint Johns, Red Sea, Egypt, Africa

Black Feather Star (Himerometra Bartschi) and Gorgonian Sea Fan (Subergorgia Mollis) underwater, Palau

Black Feather Star (Himerometra Bartschi) and Gorgonian Sea Fan (Subergorgia Mollis) underwater, Palau

Close-up of a Gorgonian Sea Fan (Subergorgia mollis) underwater, Milne Bay, Papua New Guinea

Gorgonian Sea Fan (Subergorgia Mollis) underwater, Palau

Close-up of a Sea Fan underwater, Palau

Dog sled in a fan hitch during a storm on the sea ice of the Melville Bay near Kullorsuaq in North Greenland. North America, danish teritorry

Inuit hunter on dog sled on the sea ice of the Melville Bay near Kullorsuaq in North Greenland. North America, danish teritorry

A photographer lines up with a camera in a housing to shoot a large red soft coral fan, Indonesia

Palau, longnose hawkfish on yellow sea fan

Soldierfishes under Sea Fan, Annella mollis, Siaes Wall, Micronesia, Palau

Red sea fan and scuba diver, gorgonaria, Papua New Guinea, Pacific Ocean