Juergen Freund / Chambered nautilus (Nautilus pompilius) with red whip coral. Osprey Reef, Great Barrier Reef, Queensland, Australia.

Fred Bavendam / Golden Damselfish (Amblyglyphidodon Aureus) in front of Soft Coral (Ctenocella sp), Figi

Alex Mustard / Red whip coral (Ctenocella sp.) with a school of fish above. Fiabacet Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea, Tropcial West Pacific Ocean

Ingo Arndt / Fan Coral (Ctenocella pectinata) from Lizard Island, Australia in collection at Senckenberg Museum, Frankfurt, Germany.

Alex Mustard / Seawhip gorgonian (Ctenocella / Ellisella sp) growing in a coral cavern. Ra Province, Viti Levu, Fiji, Polynesia, Pacific Ocean

Pascal Kobeh / Diver near barrel sponge (Xestospongia testudinaria), hard coral (Porites sp) and red whip coral (Ctenocella sp), Walindi, Papua New Guinea, Bismarck Sea.

Alex Mustard / Golden damselfish (Amblyglyphidodon aureus) hiding amongst the branches of red whip coral (Ctenocella sp.) Misool, Raja Ampat, West Papua, Indonesia.

Birgitte Wilms / Cowry (Aclyvolva sp) camouflaged on Soft Coral (Ctenocella sp), Papua New Guinea

Sue Daly / Sea fan coral (Ctenocella sp) Cebu, Philippines, March

Juergen Freund / Shrimpfish (Aeoliscus strigatus) camouflaged amongst red whip corals (Ctenocella pectinata) Indo-pacific

Juergen Freund / Red whip corals (Ctenocella pectinata) with Featherstar (Crinoidea) attached, Indo-pacific

GEORGETTE DOUWMA / Red whip coral (Ctenocella pectinata). New Guinea. Indo-Pacific.