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

starfish ultra macro beam hand with suction cups. marine animals of the world ocean with a large zoom

Close up of the retracted tentacles of a Red of Soft Coral in the St. Lawrence River.

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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

Red pencil urchin, Heterocentrotus mamillatus, in a brilliant red color typical of specimens near Hawaii.

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

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

Abstract Science nanotechnology surface - 3d rendered SEM (TEM) like image. Medical research concept.

An electric blue fish swims among coral and sea urchins

Red Pencil Sea Urchin, Big Island Hawaii

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

Eucidaris thouarsii, the slate pencil urchin, is a species of cidaroid sea urchins that inhabits littoral regions of the East Pacific Ocean. Sea of Cortez, Mexico. Underwater.

$Tube Anemone Cerianthus filiformis is a species of marine Cnidaria in the family Cerianthidae.\nThe species is widespread throughout the tropical waters of the Indo- West Pacific in a depth range from shallow to 100m, has a stretched and muscularised body which can reach 35 cm.\nCerianthus filiformis lives in a mucous tube which is sunk in the soft substrate The animal shows only its tentacles to feed, usually at night time. The species feeds on small planktonic organisms, tiny crustaceans, larval forms, and other minute organisms drifting in the water column. The long, slender tentacles of Cerianthus filiformis are equipped with cnidocytes (stinging cells) that help capture prey. \nLembeh Strait, North Sulawesi, Indonesia \n1°27'34.836 N 125°13'17.046 E at 8m depth by night$

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

Macro photo of plant in abstract for for depicting data transfer, artificial intelligence, big data, data computing, quantum computing. No people are seen in frame. Shot in studio with a full frame mirrorless camera and a macro lens.

Sea Squirt, Seescheide (Botrylloides leachii)

Fire worm underwater Sea life Scuba diver point of view

Crown-of-thorns starfish (Acanthaster planci), Zanzibar, Tanzania

Purple Sea Urchin Close Up Underwater Southeast Alaska

Macro photo with the needles of a pastel-colored cactus

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. The 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. Astropyga 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.This 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. The 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. Lembeh Strait, Indonesia 1°28'56.394 N 125°15'15.588 E at 8m depth

A beautiful purple and pink hairy squat lobster hides in a crevice on a sponge.

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.

Heterocentrotus mamillatusn is a species of tropical sea urchin from the Indo-Pacific region.

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