A blue-spotted sea urchin (Astropyga radiata), Hawaii, United States of America, Pacific, North America

Longspined Sea Urchins between Rocks, Diadema antillarum, Caribbean Sea, Dominica

Red pencil urchin, (Heterocentrotus mammilattus), Blowhole, Oahu, Hawaii, United States of America, Pacific

Fire urchin (Asthenosoma varium), Sinandigan wall, Puerto Galera, Mindoro, Philippines, Southeast Asia, Asia

Common sea urchin (Echinus esculentus), view of empty test, St Abbs, Scotland, UK

Longspread Urchin (Diadema antillarum). British Virgin Islands.

Common Urchin (Echinus esculentus), Sark, Channel Islands

A wolf eel (Anarhichas lupus) bites into its favorite food, a sea urchin.

Sea bottom of False Bay are the natural habitat of sharks, seals, whales and dolphins, South Africa

Keyhole Urchin, Sanddollar (Mellita quinquiesperforata), on beach, Sanibel Island, Florida, USA

Colony of white-spotted diadem Black Longspine Urchin sp (Diadema setosum) on seagrass meadow, Red Sea, Aqaba, Kingdom of Jordan

Dolphins, fish, sea urchins, dolphin fresco, Queen's Megaron, Palace of Knossos, Heraklion, Central Crete, Island of Crete, Greece, Europe

Banded Sea Urchin (Echinothrix Calamaris) On A Sandy Bottom Off The Kona Coast, Kona, Island Of Hawaii, Hawaii, United States Of America

Dried Up Sea Urchin Shells Lie Admist A Bed Of Shells Along The Shoreline Of The Ocean, South Africa

Both a Crinoid Commensal Shrimp (Periclimenes cornutus) and a Crinoid Squat Lobster (Allogalathea elegans) on a crinoid. These tiny crustaceans are commensal on crinoids or feather stars and take their color from the host, Philippines

Detail of the center branching arms of a Crinoid or Feather Star (Lamprometra klunzingeri) open and feeding on plankton at night, Philippines

Hawaiian reef scene with soldierfish and goatfish, Hawaii, United States of America

Colourful coral reef and schooling fish, Hawaii, United States of America

Violet Sea Urchin, Sphaerechinus granularis, Istria, Adriatic Sea, Croatia

Plumose Anemones and Urchins, Pacific Ocean Alaska

contamination: Purple sea urchin (Sphaerechinus granularis).Tenerife, Canary Islands.

Close up of sea urchin in the Mediterranean sea

Anemone (Urticinopsis antarctica). It is a filter feeder and opportunistic predator. Antarctic Peninsula, Antarctica

Violet Sea Urchin (Sphaerechinus granularis), Tenerife, Canary Islands, Spain, Atlantic Ocean

Diadema sea urchin, Poor knights Island New Zealand

Urchins on the reef, Alaska Pacific Ocean