Jordi Chias / Spotted catshark (Scyliorhinus canicula) just hatched from egg case that is on Seafan (Paramuricea clavata), Ullastres seamount, Costa Brava, Llafranch, Catalunya, Spain

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) in red seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in total length. Tulamben, Bali, Indonesia, Java Sea, August.

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Georgette Douwma / Seafan {Gorgonacea} Great Barrier Reef, Australia

Georgette Douwma / Seafan {Gorgonacea} Great Barrier Reef, Australia

DAVID HALL / Featherstar on red seafan {Crinoidea}, Solomon Islands

Alex Mustard / Coral grouper (Cephalopholis miniata) waits in ambush, hiding against a seafan (Annella sp.) hunting silversides (Atherinidae), with schooling bigeye snapper (Lutjanus lutjanus) behind. Misool, Raja A...

Alex Mustard / Red seafan (Melitheae sp.) and soft coral (Dendronephthya sp.) on a reef drop off, with schooling silversides (Atherinidae). Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific...

Alex Mustard / Pygmy seahorse (Hippocampus bargibanti) camouflaged in a seafan (Muricella sp.). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Whitebelly damselfish (Amblyglyphidodon leucogaster) pair spawning / laying eggs on a seafan (Annella mollis). Ras Mohammed National Park, Sinai, Egypt. Red Sea.

Alex Mustard / Red seafan (Melithaea sp) South Atoll, Tubbataha Atolls, Tubbataha Reefs Natural Park, Palawan, Philippines. Sulu Sea.

Franco Banfi / Scuba diver looking at Red seafan (Gorgonia sp) Crystal Bay, Nusa Penida, Bali Island, Indonesia, Pacific Ocean. September 2006.

Alex Mustard / Stripehead dwarfgoby (Trimma striata) on a seafan (Melithaea sp.). Daram Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea, Pacific Ocean.

Pascal Kobeh / Longnose hawkfish (Oxycirrhites typus) in amongst seafan / gorgonian, Sudan. Red Sea.

Franco Banfi / Red seafan (Paramuricea clavata) damaged from the high temperature of the water, covered with algae, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Red seafan (Paramuricea clavata) damaged from the high temperature of the water, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Polyps of red seafan (Paramuricea clavata) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Red seafan (Paramuricea clavata) and Yellow cluster anemone (Parazoanthus axinellae) Punta Sant'Angelo dive-site, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Red seafan (Paramuricea clavata) and fish, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Red seafan (Paramuricea clavata) and Yellow cluster anemone (Parazoanthus axinellae) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Red seafan (Paramuricea clavata) Yellow gorgonian (Eunicella cavolini), Yellow sponges (Aplysina cavernicola) and Yellow cluster anemone (Parazoanthus axinellae) Punta Sant'Angelo dive-site, Ischia Is...

Franco Banfi / Scuba diver and Red seafan (Paramuricea clavata) Yellow gorgonian (Eunicella cavolini) and Yellow Cluster Anemone (Parazoanthus axinellae), Punta Sant'Angelo dive-site, Ischia Island, Italy, Tyrrhenia...

Franco Banfi / Red seafan (Paramuricea clavata) Yellow gorgonian (Eunicella cavolini) and Yellow Cluster Anemone (Parazoanthus axinellae) Punta Sant'Angelo dive-site, Ischia Island, Italy, Tyrrhenian Sea, Mediterran...

Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Alex Mustard / Denise's Pygmy Seahorse (Hippocampus denise) on a coral seafan. Misool, Raja Ampat, West Papua, Indonesia, November.

Alex Mustard / Pygmy Seahore (Hippocampus bargibanti) in red seafan. Pygmy seahorses are small, most less than 15mm in total length. Lembeh Strait, Sulawesi, Indonesia, June.

David Shale / Brittlestar (Ophiuroidea) on Gorgonian seafan coral mid Atlantic Ridge, June 2010

GEORGETTE DOUWMA / Abstract Close-up of Seafan detail {Gorgonacea}, Egypt Red Sea

GEORGETTE DOUWMA / Coral reef scenic with seafan and soft coral Red Sea, Egypt

Jeff Rotman / Giant seafan coral {Subergorgia hicksoni} and Anthias fish on reef, Red Sea

Jeff Rotman / Diver with Gaint seafan coral {Subergorgia hicksoni} Red Sea Model released.

Roberto Rinaldi / Longsnout seahorse / slender seahorse (Hippocampus reidi) in a white gorgonian seafan (Gorgonacea), Honduras

Roberto Rinaldi / Squat lobster (Galathea squamifera) on red gorgonian seafan (Paramuricea clavata), Elba, Italy.

Roberto Rinaldi / Mediterranean basket star (Astrospartus mediterraneus) red gorgonian seafan (Paramuricea clavata), Italy, Mediterranean sea.

Alex Mustard / Tiny (1cm) Pygmy seahorse (Hippocampus bargibanti) hides in the branches of its home seafan (Muricella sp.) on a coral reef. Daram Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea.

Franco Banfi / Seafan / Red gorgonian (Paramuricea clavata) and Light-bulb sea squirt (Clavelina lepadiformis) Punta Carena, Capri Island, Sorrentine Peninsula, Italy, Tyrrhenian Sea, Mediterranean.

Alex Mustard / Denise's pygmy seahorse (Hippocampus denise) on a red and white seafan (Melithaea sp). Wayil Batan Island, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea, Tropical West Pacific Ocean.

Alex Mustard / School of cardinalfish (Apogon sp.) mass in cave in coral reef, above Red seafan (Melithaea sp.). Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean.