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An underwater tropical wonderland featuring large round orange Porite Corals

Mediterranean purple sea urchin - Sphaerechinus granularis

Close up of bright orange soft coral head pattern underwater, Great Barrier Reef, Queensland.

Single purple sea urchin in the middle of coral reef tank in an aquarium

Water drops on black and blue background, with amazing texture and scratches. Amazing space textures

The remains, shell, or exo skeleton of a sea urchin by a coastal rock pool.

Macro detail yellow and white king protea

Beautiful sea flowers in underwater world with corals

Black and white abstract selective focus image of a sea urchin's shell zooming in on the beautiful texture

Close-up of bubbles of air in a water bottle.

Coral reef in aquarium for design purpose, wallpaper

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

Close up background of white and purple sea urchin, close up

Purple Sea Urchin Close Up Underwater Southeast Alaska

Yellow nudibranch eggs. Close up Abstract. Exploring and enjoying Beautiful Sea Life macro . Underwater scene at clear mediterranean sea. Scuba diver point of view. Greece Europe. Underwater photography. Photographed with Nikonos V, 35mm lens Macro 1:1 (real size 24x36mm) on Fujichrome Velvia 50

A close-up shot of a sea urchin mouth with sharp teeth on a marble surface.

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

sea urchin isolated on a white background.

Close-up of the skin of a porite coral featuring the wonderful textures that you can only find in nature

$Blue Spotted Sea Urchin Astropyga radiata occurs in the tropical Indo-Pacific Ocean from the African coast to Australia and to Hawaii in a depth range from 0 to 60m, usually 10 to 30m, max. test diameter 20cm. \nThe species is often found in lagoons and bays where the substrate is sand, shingle or coral rubble. Sometimes many urchins collect together in one locality in dense aggregations. \nAstropyga radiata is mostly nocturnal and feeds by grazing on algae. The mouth is at the centre of the oral (under) surface where there are five powerful teeth.\nThis urchin is light sensitive and can angle its spines towards an approaching threatening object, but rather than centralized eyes, Astropyga radiata has a distributed sensory system. Funny thing is that many people think the thing in the middle is the eyeball, but it is the rectum. \nThe sexes are separate in Astropyga radiata. Eggs and sperm are liberated into the water column. After fertilisation, the larvae are planktonic and develop through several stages before settling on the seabed. \nLembeh Strait, Indonesia \n1°27'13.104 N 125°14'14.634 E at 12m depth$

Edible sea urchin Echinus esculentus underwater in Norway cold clear waters

An electric blue fish swims among coral and sea urchins

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

A close-up shot of dried hardened coral.

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