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close-up sea urchin on rock with blue sea in background. Paracentrotus lividus
Purple Sea Urchin Close Up Underwater Southeast Alaska
Close-Up Of Sea Urchin On Rock In Sea
Sea Urchins, California. Strongylocentrotus purpuratus
A little sea urching on the beach
Long-spined sea urchin (Diadema antillarum) on the coral reef of Guadeloupe (Caribbean, France)
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.
Sea Urchin on Rock Near Ocean Background
Arbacia lixula
Black sea-urchin standing on the yellow wood.
Mediterranean purple sea urchin - Sphaerechinus granularis
Sea Urchin
Sea urchin Evechinus chloroticus on rock covered with layer of sediment and some vegetation.
Sea Urchin Echinoderm shell texture. Underwater Sea life,  Macro abstract. Blue sea in  background.
Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Thasos island
colorful Anemone flower sea and coral
Background of Kina Shells with differential focus. The focus is on the top Kina Shell. This photo is in soft focus.
Black Sea urchins on rock. Diadema setosum long spined on ocean floor, selective focus
Centrostephanus longispinus, the hatpin urchin, is a species of sea urchin in the family Diadematidae. There are two subspecies, Centrostephanus l. longispinus, found in the eastern Atlantic and Mediterranean Sea and Centrostephanus l. rubricingulus, found in the western Atlantic.
Sea urchin
A serene night scene of a water surface with tiny fish eggs gently floating, reflecting moonlight and creating a peaceful, mysterious aquatic ambiance.
Sea Urchin Echinoderm  Underwater Sea life
Single purple sea urchin in the middle of coral reef tank in an aquarium
A vibrant sea urchin clings to a rock under the water’s surface.
Black sea urchin (Arbacia lixula) undersea, Aegean Sea, Greece, Skiathos island, Vasilias beach
Cala Fosca in Costa Brava\n\nParacentrotus lividus
little sea urchin in the rocks
Two lion fish swimming in the shallows off Seven Mile Beach in Negril, Jamaica.
black long spine sea urchin pulling back in his eye
Blue Spotted Sea Urchin Astropyga radiata occurs in the tropical Indo-Pacific Ocean from the African coast to Australia and to Hawaii in a depth range from 0 to 60m, usually 10 to 30m, max. test diameter 20cm. \nThe species is often found in lagoons and bays where the substrate is sand, shingle or coral rubble. Sometimes many urchins collect together in one locality in dense aggregations. \n\nAstropyga radiata is mostly nocturnal and feeds by grazing on algae. The mouth is at the centre of the oral (under) surface where there are five powerful teeth.\nThis urchin is light sensitive and can angle its spines towards an approaching threatening object, but rather than centralized eyes, Astropyga radiata has a distributed sensory system. Funny thing is, a lot of people think the thing in the middle is the eyeball, but the rectum. \n\nThe sexes are separate in Astropyga radiata. Eggs and sperm are liberated into the water column. After fertilisation, the larvae are planktonic and develop through several stages before settling on the seabed. \n\nLembeh Strait, Indonesia \n1°28'56.394 N 125°15'15.588 E at 8m depth
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