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Long-spined sea urchin (Diadema antillarum) on the coral reef of Guadeloupe (Caribbean, France)
Blue sea urchin on glass in a marine aquarium
Black sea urchin oral face ,  Arbacia lixula
Crown of thorns starfish, Acanthaster ellisii, Sea of Cortez, Mexico. Sea star. Red and orange starfish on a rock.
Urchin macro photography сlose up. In the water.
Feather star on soft coral head in tropical blue ocean water
Serene underwater environment surrounding Boracay Island, located in the Philippines. The image showcases a stone coral formation with a black urchin resting upon it. The black urchin is characterized by long, slender needles. The underwater scene features clear blue water with visible sunrays, adding a touch of natural illumination to the photograph.
A sea urchin lies in a wet swimming mask
Yellowspotted burrfish (cyclichthys spilostylus) using its defense system. Red sea
This image shows several sea urchins, with one opened to reveal its bright yellow insides. The sea urchin's shell is covered with black spines, creating a sharp contrast. The background consists of light-colored ice, highlighting the details of the sea urchin.
Underwater photo of Purple Sea Urchin in natural habitat the sea with yellow coral in background. Blue sea
Asthenosoma varium is a large urchin (25 cm) with flattened, flexible test (the plates are articulated rather than fused). Very mobile, short spines, arranged in rectangular areas, separated by spineless areas. Spines have a blue swelling close to the tip, filled with venom.Living in bay, lagoon, external reef; on sandy or rubble bottoms. The flexible test allows, changing the shape, to enter very narrow crevices. The swollen shape of the spines and the flexible test are unique features. \nAsthenosoma varium sting can be very painful, a strong local pain due to venom injection can last for hours.\nThis specimen was encountered in a very shallow tunnel in the Triton Bay, Indonesia \n3°54'51.39 S 134°7'24.81 E at 2m depth
Tropical salt water fish Striped burrfish (Chilomycterus schoepfi)
Diadema setosum
Realy curious animal of the dark sea, this is a puffer fish, nicely isolated from its background.
Anthopleura xanthogrammica, or the giant green anemone, is a species of intertidal sea anemone of the family Actiniidae. Other  names for this anemone include green surf anemone, giant green sea anemone, green anemone, giant tidepool anemone, anemone, and rough anemone.  Salt Point State Park, California.
Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki
A sunburst sea anemone in a tidal pool on the coast of Newport Beach, California during the winter.
Coral reef in  indian ocean in Kenya. Ocean life.
View of a female sea-urchin.
Photograph of a sea urchin living in the Atlantic Ocean
A West Indian Sea Egg (Tripneustes ventricosus) in Florida, USA
Crown of thorns starfish, Acanthaster ellisii, Sea of Cortez, Mexico. Sea star. Red and orange starfish on a rock.
Test (shell) of Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki, Pirgos beach
colorful Anemone flower sea and coral
Millions of Golden jellyfish, Mastigias papua etpisonii, swim in Palau's famous Jellyfish Lake. The jellyfish population grows with cooler water temperature and falls with warmer temperatures.
Tide pools with sea life
sea urchin skeleton isolated on white background
Close-up of Sea urchins or urchins, also known as sea hedgehogs, lying on the sand.
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