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Red Sea migrant sea urchins on Turkey's Aegean coast
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.
Group of sea urchins underwater ( purple sea urchin  Paracentrotus lividus), eastern Atlantic Ocean, Spain, Galicia
Long-spined sea urchin (Diadema antillarum) on the coral reef of Guadeloupe (Caribbean, France)
Underwater image of Caribbean Reef Sharks
Lionfish
Hairy Frogfish - Antennarius striatus. Underwater macro world of Tulamben, Bali, Indonesia.
Underwater , Sea Urchin (Echinoderm)
Great Hammerhead shark making a hard right turn over the sand.
Close up of juvenile Great White Shark swimming through murky water hunting for prey. Photographed at Neptune Islands, South Australia.
Sea urchin
Off the Island of Fakarava there is a famous dive site called the 'Wall of Sharks' where over 500 sharks can be seen at anythime. Considered to be one of the best dives in the world.
Purple sea urchin in Channel Islands California
Beautiful sea star from Zanzibar
Common Sea Urchin, Paracentrotus lividus, Cabo Cope Puntas del Calnegre Natural Park, Mediterranean Sea,  Murcia, Spain, Europe
Blacktip Reef Shark Carcharhinus melanopterus occurs in the tropical and subtropical Indo-Pacific from the Persian Gulf, the Red Sea and East Africa to the Hawaiian Islands and the Tuamoto Archipelago, north to Japan and south to Australia and through the Suez Canal in the eastern Mediterranean, in a depth range from 0-75m, max. length 200cm. Rainbow Runners Elagatis bipinnulata inbetween the sharks. The species occurs circumtropical and subtropical in a depth range from 0-150m, usually 2-10m, max. length 180cm, usually 90cm. Palau announced 2009 world's first shark sanctuary, banned all commercial shark fishing within its exclusive economic zone. 600000 sq km (230,000 sq mi) of ocean are protected now. As a result, divers see more sharks here than anywhere else! Palau, near German Channel, 7°7'13.279 N 134°16'23.389 E at 1m depth. This is a composite photo.
Picture shows a lemon shark during a scuba dive
Strongylocentrotus purpuratus, or the purple sea urchin, is one of the sharp-spined sea urchin species. California coast.
Several sea urchins with white and black spines move their spines merging into lump at the bottom tropical warm waters of a coral reef..
On the ocean floor of the Indo-Pacific Ocean
A School of Caribbean Reef Shark in Gran Bahamas
Swimming sharks in dark waters. This is entirely 3D generated image.
Sailrock trip october 2023 when out to sailrock trip for 2 dives . It was amazing visability
Feather star on soft coral head in tropical blue ocean water
Grey Nurse Shark (Sand Tiger Shark or Rugged Tooth Shark) surrounded by a school of commensal fish. Photo taken at Flat Rock, North Stradbroke Island, Australia.
The genus Acropora has the largest number of species of all the hard corals, and they are among the important building blocks of a reef. Larger colonies are more commonly seen on undisturbed and remote reefs. Many species grow into branching forms that give rise to common names like \
Computer generated 3D illustration with an ammonoid
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.
Sardines and dolphins in South Africa
View of the grey reef shark (Carcharhinus amblyrhynchos) in Palau - Micronesia
Free Images: "bestof:Expl2777 Strongylocentrotus fragilis.jpg en An aggregation of sea urchins Strongylocentrotus fragilis apparently devouring a fairly large dead creature Image ID"
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