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Mediterranean purple sea urchin - Sphaerechinus granularis

Purple Sea Urchin Close Up Underwater Southeast Alaska

Sea Urchin Echinoderm Underwater Sea life, Macro abstract background. sea urchin spines and teeth

Sea urchin Evechinus chloroticus on rock covered with layer of sediment and some vegetation.

$Tubifer Cardinalfish Siphamia tubifer (ex. Siphamia versicolor) occurs in the tropical Indo-West Pacific from the Red Sea south to Madagascar and east through the Maldives, Sri Lanka and India to the Andaman Sea Islands and to Western Australia, north to the Ryukyus andthroughout the Indo-Malayan region to Vanuatu in a depth range from 1 to 100m, usually to 18m depth, max. length 7cm. \nThe species forms small groups with long-spined urchins, but is also found among the spines of Acanthaster planci. Siphamia tubifer feeds on zooplankton and small invertebrates. The specimen encountered in this Blue Spotted Sea Urchin Astropyga radiata is dark brown. Depending on the phase the species can be striped instead.\nBlue Spotted Sea Urchin Astropyga radiata occurs in the tropical Indo-Pacific Ocean from the African coast to Australia and to Hawaii in a depth range from 0 to 60m, usually 10 to 30m, max. test diameter 20cm. \nThe species is often found in lagoons and bays where the substrate is sand, shingle or coral rubble. Sometimes many urchins collect together in one locality in dense aggregations. \nLembeh Strait, North Sulawesi, Indonesia \n1°28'47.814 N 125°15'1.26 E at 23m depth$

Sea urchins among corals camouflaged against dark background, on rough bottom surfaces in an aquarium. Selective focus around the middle of image. Scene in artificial lighting.

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 Long Spined Sea Urchin (Centrostephanus longispinus) in the Mediterranean Sea

Rock boring urchin, Echinometra mathaei, nestled in a crevise of a tide pool. The urchin uses it jaws to enlarge the hole as it grows. Ko Olina, Oahu, Hawaii.

Underwater image of one Lionfish aka Zebrafish (Pterois volitans). These fish have venom in their spiny spiky fins. They are a non aggressive species, often seen low on the coral reef. However if they are provoked they will use the venom to ward off attackers. Their red and white stripes are warning colours for the toxins (Aposematism). They are natural species to Asia however are invasive species in the Caribbean. Footage taken whilst scuba diving at Hin Bida, Andaman Sea, Krabi province, Thailand. Taken on Sony mirrorless camera with underwater housing and Inon Z330 strobe.

Spiny black sea urchin (Diadema setosum) grazing on algae in tropical coral reefs. Vital for reef ecosystem balance.

Black Long-spined Sea Urchin. Diadema setosum.

The Red Urchin, blue-spotted urchin; Fire Urchin or False Fire Urchin, Astropyga radiata, is an urchin, with a test (shell) diameter of about 20 cm. It is found in the Indo-Pacific region. Maui Island, Hawaii

black long spine sea urchin pulling back in his eye

Sea urchin needles sharp poisonous dangerous sucker feet tentacles and mouthparts close up organism movement.

Diadem sea urchin (Astropyga pulvinata) in the sea of Cortez (Mexico)

detailed shot of a sea urchin, highlighting its intricate spines with a softly blurred background. Captured at Sea World Ancol, September 25, 2024.

Sea Urchin Echinoderm Underwater Sea life

Close up black sea urchin or long spines sea urchin an exotic water animal shown in aquarium

Black Sea urchins on rock. Diadema setosum long spined on ocean floor, selective focus

Crown-of-thorns starfish (Acanthaster planci) resting on the seabed, surrounded by vibrant algae and corals in Kizimkazi, Zanzibar, Tanzania, showcasing the rich marine life of the region

Underwater Sea Urchins on a Rock, Close Up Underwater Urchins

Blue-spotted sea urchin on the coral reef under the sea surface movements.

Sea Urchin Echinoderm shell texture. Underwater Sea life, Macro abstract background.

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