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Long-spined sea urchin (Diadema antillarum) on the coral reef of Guadeloupe (Caribbean, France)
Yellowspotted burrfish (cyclichthys spilostylus) using its defense system. Red sea
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.
Underwater photo of Purple Sea Urchin in natural habitat the sea with yellow coral in background. Blue sea
Clownfish sheltering in an anemone while snorkelling a coral reef
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.
A sea urchin lies in a wet swimming mask
Blue sea urchin on glass in a marine aquarium
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.
Urchin macro photography сlose up. In the water.
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
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.
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.
Yellowspotted burrfish (cyclichthys spilostylus) is in a defensive position, Red Sea
colorful Anemone flower sea and coral
Tropical salt water fish Striped burrfish (Chilomycterus schoepfi)
Brissus unicolor
Test (shell) of Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki, Pirgos beach
Feather star on soft coral head in tropical blue ocean water
Arbacia lixula, the black sea urchin, is a species of sea urchin from Europe. It is a medium-sized sea urchin, characterized by its deep black color and its hemispherical shape. All of its spines are roughly the same size (no \
Sea urchin on a male hand. Shor underwater.
Photograph of a sea urchin living in the Atlantic Ocean
View of a female sea-urchin.
A West Indian Sea Egg (Tripneustes ventricosus) in Florida, USA
A sunburst sea anemone in a tidal pool on the coast of Newport Beach, California during the winter.
Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki
Sea life, close up, macro   Beautiful multicolored white, purple and orange Nudibranch. Underwater beauty Scuba diver point of view. Underwater photo.
Sea urchin
A pink sea urchin is just below the water’s surface.
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