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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
Blue sea urchin on glass in a marine aquarium
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
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
Diadema setosum
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.
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.
Yellowspotted burrfish (cyclichthys spilostylus) is in a defensive position, 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.
Urchin macro photography сlose up. In the water.
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.
flying gurnard, elongated fish with it's colorful winglike posterior fin section extended
Big Blue Octopus Octopus cyanea  occurs in the tropical Indo-Pacific from eastern Africa to the Hawaiian Islands in a depth range from 0-150m, max. mantle length 22cm with arms to at least 80 cm. \nBig blue octopuses are found living in muddy, sandy, or rocky bottoms, and in seagrass beds. They create lairs or dens in crevices or coral rubbles within coral reefs. These dens aren't used for long term; on average individuals spend up to 35 days in one den. The average lifespan of big blue octopuses is 12 to 15 months.\nThis juvenile specimen was encountered in the Triton Bay, Indonesia \n3°54'41.052 S 134°7'18.204 E at 12m depth
Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki
colorful Anemone flower sea and coral
Photograph of a sea urchin living in the Atlantic Ocean
Feather star on soft coral head in tropical blue ocean water
Coral reef in  indian ocean in Kenya. Ocean life.
Tropical salt water fish Striped burrfish (Chilomycterus schoepfi)
Detail of small tunicates colonizing a coral reef in Komodo National Park, Indonesia. Tunicates filter organic material from the ocean, improving water quality.
View of a female sea-urchin.
Test (shell) of Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Halkidiki, Pirgos beach
Lemonfish Plectorhinchus flavomaculatus, a Sweetlips species, occurs in the tropical Indo-West Pacific from the Red Sea south to Transkei, South Africa and east to Papua New Guinea, north to southern Japan, south to western Australia and New South Wales in a depth range from 2-25m, max. length 60cm.\nThis specimen was encountered near a Black Coral Forest in\nTriton Bay, Kaimana Regency, \nWest Papua Province, Indonesia \n3°55'1.098 S 134°6'4.638 E at 15m depth
anemone clown fish(nemo) eggs underwater macrophography in raja ambon indonesia
A sunburst sea anemone in a tidal pool on the coast of Newport Beach, California during the winter.
Fresh sea urchins, ricci di mare, on a rock, close up, selective focus. A typical dish of Salento, Puglia, is eaten raw with bread, or made with pasta. Southern Italy. Seafood backgound.
Fried egg jellyfish (Cotylorhiza tuberculata), Mediterranean Fried Egg Jellyfish - Cotylorhiza tuberculata. Blue water
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