David Fleetham / Blue-spotted Sea Urchin (Astropyga radiata) expelling waste from the sac in the center of it's body. Maui, Hawaii.

David Fleetham / Close up of underside of Panamic cushion star (Pentaceraster cumungi), Galapagos Islands, Ecuador.

David Fleetham / Crinoid shrimp (Periclimenes amboinensis) on matching Feather star (Comanthus bennetti) Philippines.

David Fleetham / Necklace sea star (Fromia monilis) on gorgonian coral, Indonesia.

Andy Jackson / 2020VISION / Male Cuckoo wrasse (Labrus mixtus) feeding on a Sea urchin (Echinoidea), Lochgary Wreck, Kirkwall, Orkney, Scotland, UK, June.

Juan Carlos Munoz,Juan Carlos Munoz / Starfish Beach, with many starfish in the shallow sea (Asteroidea) Colon Island, Bocas del Toro Archipelago, Bocas del Toro Province, Panama,

Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...

Jeff Rotman / Northern Sea Stars (Asterias vulgaris) feeds on bed of mussels. Cathedral Rocks, Gloucester, Massachusetts, New England USA - North Atlantic Ocean.

Tui De Roy / Flightless Cormorant (Nannopterum / Phalacrocorax harrisi) with chick at nest, made from dead starfish. Banks Bay, Isabela Island, Galapagos Islands, Ecuador, December.

Solvin Zankl / Spines of sea urchins from sand sample from Raja Ampat, Indonesia, the wide range of colours of these animals become visible. Diagonal of frame approx. 5 mm Digital focus stacking image

Sue Daly / Red sea star (Echinaster sepositus) and bryozoans fauna. Channel Islands, UK July. Highly commended, 'Habitat' category, British Wildlife Photography Awards (BWPA) competition 2012.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

Alex Mustard / 2020VISION / Common sea urchins (Echinus esculentus) beneath a stand of kelp, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

David Shale / Close up of deepsea Basket star (Gorgonocephalus sp) from coral seamount, SW Indian Ridge, Indian Ocean, December 2011

Chadden Hunter / Brinicles (brine icicles or ice stalactites) forming under the ice, growing towards the sea floor, Ross Sea, McMurdo Sound, Antarctica. Taken on location for 'Winter' episode of the BBC Frozen Planet...

Linda Pitkin / 2020VISION / Common Sunstar (Crossaster papposus), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011

Linda Pitkin / 2020VISION / Black brittlestar (Ophiocomina nigra), yellow colour variety, with Common brittlestars (Ophiothrix fragilis), on sea bed, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotlan...

David Shale / Deepsea Featherstar (Crinoidea) on Primnoid coral seafan from a coral seamount in the Indian Ocean, December 2011

David Shale / Deepsea Basket star (Gorgonocephalus sp) from coral seamount in the Indian Ocean, November 2011

Alex Mustard / 2020VISION / Common sunstar (Crossaster papposus), brittlestars and sealoch anemones form a typical undersea community in a Scottish sea loch, Loch Duich, Ross and Cromarty, Scotland, UK, April 2011

Alex Mustard / 2020VISION / Common / Red sunstar (Crossaster papposus) amongst Dead man's fingers (Alcyonium digitatum) on a rocky reef, beneath kelp. Shetland Islands, Scotland, UK, June.

Juergen Freund / Banded brittle star / Tiger stripe serpent star (Ophiolepis superba) on a hard coral, Papua New Guinea.

Juergen Freund / Brittlestar on gorgonian fan coral, Papua New Guinea.

Juergen Freund / Featherstars / crinoids attached to Gorgonian coral, West New Britain, Papua New Guinea.

Juergen Freund / Coral reef landscape with abundant whip corals, Blue sea stars and hard coral, North Sulawesi, Indonesia, October 2009.

Juergen Freund / Sea apple (Pseudocolochirus violaceus) with tentacles exposed, feeding, Komodo NP, Indonesia, Indo-pacific.

Juergen Freund / Eyed / Leopard sea cucumber (Bohadschia argus), close-up of the skin. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Star shaped Pincushion / Pillow cushion starfish (Culcita novaeguinea), detail of the underbelly. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Star shaped Pincushion / Pillow cushion starfish (Culcita novaeguinea), detail of the underbelly. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Imperial / Emperor shrimps (Periclimenes imperator / Zenopontonia rex) on a sea cucumber. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Tiny Brittlestars (Ophiuridae) wrapped around the branches of Fan coral, Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Featherstar (Comantheria briareus) on red fancoral. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Feather star (Crinoidea) underside. Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Feather star (Crinoidea) underside. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Friant's sea star (Nardoa frianti), close-up of skin of the upper side. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Blue linkia starfish (Linckia laevigata) pair attached to the dead part of coral, New Ireland, Papua New Guinea

Juergen Freund / Blue starfish shrimp (Periclimenes soror) on starfish, Kimbe Bay, Papua New Guinea, Indo-Pacific.

Juergen Freund / A small Necklace sea star (Fromia monilis) on larger Blue sea star (Linckia laevigata) Sipadan, Malaysia

Solvin Zankl / Sea star / Common starfish (Asterias rubens) at brachiolaria larva stage (60 days old), digital focus stacking

David Shale / Deepsea benthic Sea cucumber (Peniagone sp) with commensal polynoid polychaete, from mid atlantic ridge, depth approx 2600m, June 2010

David Shale / Deepsea benthic Sea cucumber (Peniagone porcella) from mid atlantic ridge, depth approx 2500m, June 2010

David Shale / Underside of deepsea Sea cucumber (Deima validum) from 2500m, mid Atlantic ridge, June 2010

Floris van Breugel / Giant Red Sea Urchins (Strongylocentrotus franciscanus) Purple sea urchins (Strongylocentrotus purpuratus) and Sea Anenomes (Anthopleura) underwater, in tide pools along Californian coastline, USA.

Billy Black / Starfish in half Oyster (Lophia folium) shell lying on bed of seaweed. Pumpkin Island, Maine, USA.

Thomas Lazar / American oystercatcher {Haematopus palliatus} feeding on Sea urchin, Florida, USA

Georgette Douwma / Featherstar (Crinoidea) on coral with shoal of Surgeonfish swimming in the background, Moto Mount, Indonesia

Onne van der Wal / Young man snorkeling over seagrass bed, holding a starfish, The Grenadines, Caribbean. February 2010, Model released.

Sue Daly / Large group of Sunflower sea stars (Asterias / Pycnopodia helianthoides) covering rock, pacific coast, Canada, August

Sue Daly / Large group of Sunflower sea stars (Asterias / Pycnopodia helianthoides) covering rock, pacific coast, Canada, August

Georgette Douwma / False fire urchin (Astropyga radiata) grouped on sandy bottom. Lembeh Strait, North Sulawesi, Indonesia.

Wild Wonders of Europe / Lundgren / Ratfish / Ghost shark (Chimaera monstrosa) swimming over Sea urchins, Trondheimsfjorden, Norway, February 2009

Wild Wonders of Europe / Lundgren / Edible sea urchin (Echinus esculentus) on Kelp, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Edible sea urchin (Echinus esculentus) on Kelp, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgre / Common starfish (Asterias rubens) on Kelp (Laminaria sp) Smgen, Bohuslan Sweden, May 2005. WWE INDOOR EXHIBITION

Georgette Douwma / Squat lobster (Allogalathea elegans) on featherstar, Solomon Islands. Did you know? There are over 900 species of Squat lobster in the world - most of which live around hydrothermal vents.

Wild Wonders of Europe / Muñoz / Starfish on rock at low tide, Dail Beag Beach, Lewis, Outer Hebrides, Scotland, UK, June 2009

Claudio Contreras / Cushion sea star (Oreaster reticulatus) on Turtle grass (Thalassia testudinum) Banco Chinchorro Biosphere Reserve, Caribbean Sea, Mexico, July

Wild Wonders of Europe / Lundgren / Kelp with Common / Red sunstar (Crossaster papposus) and shells, Moere coastline, Norway, February 2009

Wild Wonders of Europe / Lundgren / Blanket stars (Gorgonocephalus caputmedusae) climbing Fan coral (Paramuricea placomus) to position themselves in water current, Trondheimsfjorden, Norway, February 2009

Wild Wonders of Europe / Lundgren / Close up of Spiny starfish (Marthasterias glacialis) Moere coastline, Norway, February 2009

Wild Wonders of Europe / Lundgre / Common starfish (Asterias rubens) swimming, Saltstraumen, Bod, Norway, October 2008. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) moving, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) group, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Atlantic wolffish (Anarhichas lupus) approaching Sea urchin, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common / Edible sea urchins (Echinus esculentus) and starfish on rock with Klas Malmberg diving, house on coast visible above surface, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Atlantic wolffish (Anarhichas lupus) feeding on Sea urchin, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) swimming, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Atlantic wolffish (Anarhichas lupus) with Sea urchin in its mouth, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Atlantic wolffish (Anarhichas lupus) feeding on Sea urchin, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) moving, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) swimming, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common starfish (Asterias rubens) by a large Anemone, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Brittle star (Ophiuroidea sp) Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Two Common / Edible sea urchins (Echinus esculentus) on a rock with Klas Malmberg diving, house on the coast visible above surface, Saltstraumen, Bod, Norway, October 2008

Gary K. Smith / Common starfish {Asterias rubens} washed up on beach, Norfolk, UK, November 2008

Georgette Douwma / Burrowing sea cucumber (Neothyonidium magnum). The massive tentacular crown is the only part that is visible, the rest is buried in the sand. Feeds by picking particles out of the water with the tenta...

Juergen Freund / Horned sea stars {Protoreaster nodosus} in shallow water, Indo-Pacific

Jeff Rotman / Scarlet Psolus Sea Cucumber (Psolus fabricii), feeding with arm in mouth. Bay of Fundy, Canada, Atlantic Ocean.

Jeff Rotman / Northern Sea Star (Asterias vulgaris) regenerating lost arms. New England, USA, Atlantic Ocean.

Juergen Freund / Brittle star on sponge. (Ophiothrix suensonii) Caribbean

Jack Dykinga / Sea stars on rocks amongst surf at low tide, Fourth beach, Olympic peninsula, Olympic NP, Washington, USA

Georgette Douwma / Edible / Common sea urchin {Echinus esculentus} on rock in kelp forest, UK.

David Shale / (Luidia sarsi) bipinnaria larva, late larval stage of starfish, deep sea Atlantic ocean

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

Constantinos Petrinos / A new Starfish {Fromia} regenerates from detached arm, Sulawesi Indonesia. NB will have 6 arms instead of normal 5

Juergen Freund / Seastars in tide pool split level {Asteroidea} Canadian pacific coast

Solvin Zankl / Close up of thorns of Crown of thorns starfish {Acanthaster planci} Sulawesi, Indonesia

Georgette Douwma / Comet arm of starfish {Linckia multifora} asexual reproduction. Maldives

Georgette Douwma / Necklace starfish {Fromia monilis} on coral. Sulawesi, Indonesia

Georgette Douwma / Featherstar {Crinoidea} on Gorgonian coral. Indonesia

Georgette Douwma / Crown of thorns starfish {Acanthaster planci} Andaman Sea, Thailand

Jeff Rotman / Crinoid holds onto fire coral while feeding at night. Red Sea

Juergen Freund / Brittlestar on fan coral, Caribbean

Georgette Douwma / Purple sea urchins, California USA