Andy Murch / Happy Eddy (Haploblepharus edwardsii) amongst Cape sea urchin (Parechinus angulosus) and starfish. False Bay, Western Cape, South Africa. June.

Jurgen Freund / Moral eels, Urchins, Cuttlefish, Shrimp and other marine life living within a discarded tyre and fishing net under a ships' harbour, Maluku, Indonesia. November.

Constantinos Petrinos / Yellow stripe clingfish (Diademichthys lineatus) living in association with the Fire Urchin (Astropyga radiata) Lembeh Strait, North Sulawesi, Indonesia.

Brandon Cole / Red Sea Urchins (Stronglyocentrotus franciscanus) and Purple Sea Urchins (Stronglyocentrotus purpuratus) feeding on bottom algae and Giant kelp (Macrocystis pyrifera), Channel Islands National Marine...

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

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

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

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.

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

Brandon Cole / Red Sea Urchins (Strongylocentrotus franciscanus) and sea weed. British Columbia, Canada, Pacific Ocean, September.

Jurgen Freund / Mahonia Na Dari (Guardian of the Sea) teacher Lorna Romaso leads a group of 16 students to snorkel and learn about the reef. West New Britain, Papua New Guinea, May 2010.

Jurgen Freund / Coleman shrimp (Periclimenes colemani) on a Fire urchin (Asthenosoma varium) Moluccas Islands, Indonesia.

Jurgen Freund / Zebra / Adam's urchin crab with eggs (Zebrida adamsii) on Fire sea urchin (Mespilia globulus), Komodo NP, Indonesia, Indo-pacific.

Jurgen Freund / Carrier / Sea urchin crab (Dorippe frascone) carrying a fire urchin as a deterrent to predators. Lembeh Strait, North Sulawesi, Indonesia

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.

Brandon Cole / Tidepool showing Ochre sea stars (Pisaster ochraceus), Giant green sea anemones (Anthopleura xanthogrammica) and Purple Sea Urchins (Stronglyocentrotus purpuratus). Oregon Coast, USA, Pacific Ocean.

Brandon Cole / Split level view of a tidepool showing Ochre sea stars (Pisaster ochraceus), Giant green sea anemones (Anthopleura xanthogrammica) and Purple Sea Urchins (Stronglyocentrotus purpuratus). Oregon Coast,...

Brandon Cole / Woman (model released) explores tidepools exposed during a summer's extreme low tide. Split level view of a tidepool, marine life includes Ochre sea stars (Pisaster ochraceus), Purple sea urchins (Str...

Brandon Cole / Split level view of a tidepool, marine life includes Ochre sea stars (Pisaster ochraceus), Purple sea urchins (Stronglyocentrotus purpuratus) and various algaes. Oregon Coast, USA, Pacific Ocean.

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, Bodö, Norway, October 2008

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

Wild Wonders of Europe / Lundgren / Two Atlantic wolffish (Anarhichas lupus) looking out of hole, Saltstraumen, Bodö, Norway, October 2008

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

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, Bodö, 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, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Atlantic wolffish (Anarhichas lupus) approaching Sea urchin, 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 / 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

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

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

Georgette Douwma / Radiant sea urchin {Astropyga radiata} with Cardinal fish Sulawesi Indonesia

Georgette Douwma / Purple sea urchins, California USA

Gary Bell/ Oceanwide / Veined Octopus (Octopus marginatus) predating urchin, Anilao, Philippines

Scott Leslie / American Lobster (Homarus americanus) feeding on sea urchin, Bonne Bay, Newfoundland, Canada

Fred Bavendam / Purple Sea Urchin (Strongylocentrotus purpuratus) and Red Sea Urchin (Strongylocentrotus franciscanus) group, Channel Islands, California

Fred Bavendam / Green Sea Urchin (Strongylocentrotus droebachiensis) group and one Red Sea Urchin (Strongylocentrotus franciscanus), Quadra Island, British Columbia, Canada

Fred Bavendam / Sunflower Sea Star (Pycnopodia helianthoides) crawling amidst Kelp, Sponge, Sea Anemones, Sea Urchins, and a Sculpin, Quadra Island, British Columbia, Canada

Flip Nicklin / Purple Sea Urchin (Strongylocentrotus purpuratus) with tube feet extended into water to feed, California

Andy Murch / Redspotted catshark (Schroederichthys chilensis) on rock amongst Sea urchins (Echinoidea). Las Tacas, Chile. November.

Andy Murch / Redspotted catshark (Schroederichthys chilensis) on sea floor amongst Sea urchins (Echinoidea). Las Tacas, Chile. November.

Andy Murch / Happy Eddie (Haploblepharus edwardsii) shyshark swimming over Cape sea urchin (Parechinus angulosus) group. False Bay, Western Cape, South Africa. June.

Andy Murch / Happy eddy (Haploblepharus edwardsii) shyshark swimming over group of Cape sea urchin (Parechinus angulosus) and starfish. False Bay, Western Cape, South Africa. June.

Andy Murch / Leopard catshark (Poroderma pantherinum) swimming amongst Cape sea urchin (Parechinus angulosus). Simon's Town, Western Cape, South Africa. June.

Andy Murch / Leopard catshark (Poroderma pantherinum) in reef amongst sea urchins. Simon's Town, Western Cape, South Africa. June.

Andy Murch / Dark shyshark (Haploblepharus pictus) on reef amongst sea urchins and sea anemones. Miller's Point, Western Cape, South Africa. June.