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Mediterranean purple sea urchin - Sphaerechinus granularis

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

Natural Purple Toned Concept: Dry Sea urchin shell on lilac background with large copy space. Beautiful pattern and protective packaging cover. Organic delicate outer texture. Protecting sensitive nature

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

Sea Urchins, California. Strongylocentrotus purpuratus

Purple Sea Urchin Close Up Underwater Southeast Alaska

Coral reef in aquarium for design purpose, wallpaper

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

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

Purple Sea Urchin, strongylocentrotus purpuratus, California

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

sea urchin isolated on a white background.

Sea Urchin on Rock Near Ocean Background

Strongylocentrotus purpuratus, or the purple sea urchin, is one of the sharp-spined sea urchin species. California coast.

Paracentrotus lividus is a species of sea urchin in the family Parechinidae commonly known as the purple sea urchin. It is the type species of the genus and occurs in the Mediterranean Sea and eastern Atlantic Ocean

organic abstract images that represent futuristic technology and AI development

A close-up shot of a sea urchin lying on a beach of white pebbles. The sea urchin is in focus, while the background is blurred, creating a shallow depth of field. The image is perfect for illustrating the beauty of marine life and the natural world.

Beautiful sea flowers in underwater world with corals

Sea Urchin Echinoderm Underwater Sea life

Close-up of a vibrant purple sea urchin resting on the sandy beach.

A vibrant sea urchin clings to a rock under the water’s surface.

Beautiful sea urchin as background, macro view

Closeup of crustacean shells, with a hole from which it climbs. The marine fauna. Live nature.

$Pink Veined Didemnum Didemnum membranaceum occurs in the tropical Indo-Pacific at least from Indonesia to Micronesia in a depth range from 5 to 30m. \nColonial ascidians, or sea squirts, are sessile marine invertebrates forming colonies of interconnected zooids that share a common tunic. They filter feed using specialized siphons and reproduce both sexually and asexually, often via budding. They form striking colonies with awesome zooid arrangements, like this Colonial Ascidian Didemnum membranaceum. \nThe small holes are inhaling pores. The large holes surrounded by white areas are the exhaling orifices. \nWhile ecologically important as filter feeders and habitat providers, some colonial ascidians can become invasive, impacting ecosystems and fouling marine structures. \nLembeh Strait, North Sulawesi, Indonesia \n1°28'56.3943 N 125°15'15.59 E at 5m depth$

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