An underwater close-up of a sea urchin resting on a rocky seabed covered in algae.

An underwater close-up of a sea urchin resting on a rocky seabed covered in algae.

An underwater close-up of a sea urchin resting on a rocky seabed covered in algae. Voir plus

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A purple sea urchin with long, sharp spines rests in a shallow, clear tide pool surrounded by textured, pinkish-brown rocks.

A giant green anemone with vibrant tentacles sits in a tide pool surrounded by purple sea urchins.

A top-down view of a crimson and cream dahlia anemone in a shallow, clear rock pool surrounded by pink coralline algae and limpets, with sunlight creating caustics on the water surface.

An orange starfish with five arms rests on a pink coralline-covered rock in a shallow, clear tide pool under bright daylight.

A vibrant coral reef with purple staghorn coral and ochre brain coral sits on a sandy seabed under clear, sunlit water with rippling light caustics and a school of small fish in the background.

A leafy seadragon swims in the water beneath a jetty, with sunlight filtering down through the pilings to illuminate its golden, leaf-like appendages against a background of kelp and shadows.

Sunlight creates caustic patterns on submerged green and grey pebbles in a river, with air bubbles clinging to the stones and a clear, emerald-toned open space to the right.

A broadnose sevengill shark swims through a kelp forest with sunlight filtering through the water from above.

A cluster of vibrant orange starfish cling to a dark, wet, barnacle-covered rock at the edge of the sea under an overcast sky.

A bright orange juvenile garibaldi fish with blue spots swims in a tide pool surrounded by purple sea urchins and pink coralline algae, with sunlight creating ripples on the water surface.

A vibrant coral reef wall teeming with barrel sponges, rope corals, and small fish, illuminated by sunlight filtering through the water from the left side.

A close-up view of Acropora coral releasing pink and white gamete bundles into the dark ocean water.

An opalescent nudibranch with orange-tipped plumes and electric blue lines crawls across a textured, barnacle-covered rock in a shallow tide pool.

A massive, lumpy golden-brown Porites coral colony sits on the seafloor, illuminated by sun rays filtering through the water, with a school of small blue-green fish swimming above it.

A vibrant coral reef scene featuring brain coral, sea fans, yellow tang, and blue damselfish under clear turquoise water with surface ripples visible at the top.

Rusticles and soft corals hang from the rusted steel structure of a shipwreck underwater, illuminated by a shaft of sunlight from the surface.

A wide-angle underwater view of a vibrant coral reef teeming with yellow tang and blue damselfish, featuring brain coral and sea fans under clear, sunlit turquoise water.

A wide-angle underwater view of a coral reef with tan and violet hard corals and a school of small fish swimming in clear blue water under bright sunlight.

A mottled brown moray eel with its mouth slightly open peeks out from a dark, textured basalt rock crevice underwater, illuminated by side lighting.

Two Coleman shrimp with red and white stripes rest among the red, blue-tipped spines of a fire urchin against a dark, sandy background.

Bright orange garibaldi fish swim among purple sea urchins in a kelp forest, with shafts of sunlight filtering through the deep blue water.

A vibrant magenta and tangerine Spanish shawl nudibranch crawls across a dark brown kelp holdfast in deep blue water, illuminated by sunbeams filtering from the surface.

A purple ochre sea star rests on a rocky edge beside several giant green anemones submerged in a clear tide pool at dawn.

Sunlight filters through the water in a kelp forest, illuminating kelp bass swimming among rocky terrain and tall kelp stalks.

A leafy seadragon with golden, leaf-like appendages drifts through dark blue-green water among kelp, illuminated by a shaft of sunlight from the surface.

An underwater view of a dense kelp forest with sunlight filtering through the canopy in rays, illuminating suspended particles in the green water.

A box jellyfish swims through clear turquoise water above a vibrant coral reef under bright sunlight.

A giant Pacific octopus rests on a cluster of white plumose anemones in dark underwater conditions, illuminated by a diver's lamp from the left.

An underwater photograph showing the life cycle of a moon jellyfish attached to a wooden pier piling in green water, featuring a stack of budding discs, small star-shaped polyps, and a mature translucent bell jellyfish illuminated by sunlight from the surface.

A pair of red and white Christmas tree worms extend their spiral plumes from a textured, pale green coral head underwater.

A leafy sea dragon floats among giant kelp in a sunlit underwater environment.

A black-spotted pufferfish hovers above a coral reef in clear blue water with sunlight filtering down from the surface.

A lion's mane jellyfish with long, flowing golden-red tentacles drifts through deep, emerald-green underwater currents.

Underwater view of a Posidonia seagrass meadow with long green blades backlit by sunlight, featuring a sandy bottom with light patterns and a small school of fish swimming through the vegetation.

A wolf eel with a textured grey face peers from a rocky crevice surrounded by white plumose anemones in deep green underwater lighting.

A spotted eagle ray swims over a shallow, white sandy seabed in clear, sunlit blue water.

A sunflower sea star with numerous orange and violet arms rests on a rocky seabed in a kelp forest, illuminated by shafts of green sunlight filtering through the water.

A wide-angle underwater view of a coral reef drop-off wall featuring large barrel sponges and purple tube sponges, with the sunlit surface visible far above in the deep blue water.

A giant Pacific octopus clings to a dark, rocky underwater cave wall, surrounded by bull kelp in dim emerald green water.

Sunlight filters through the surface of the water into a kelp forest in False Bay, illuminating the tall stalks, fish, and rocky seafloor covered in sea urchins and a starfish.

A bright orange Garibaldi fish swims through a dense kelp forest with sun rays piercing the emerald water.

A basket star with its branched arms extended sits on a coral reef, illuminated by a single beam of light against a dark underwater background.

A large shoal of silver fish swims above a dense underwater forest of kelp, with sunlight filtering through the water in green shafts.

A lionfish swims in the ocean with sunlight filtering through the water surface above, set against a dark coral reef background.

A young California sea lion swims through a kelp forest with bubbles rising from its nose, illuminated by shafts of sunlight filtering through the water.

A dense thicket of staghorn coral sits in shallow, clear turquoise water, with a large school of small blue-green fish hovering above the branches and sunlight creating shimmering patterns on the sandy lagoon floor.

A blue-spotted ribbontail ray glides over white sandy seafloor beneath a large table coral formation in clear, sunlit tropical waters.

Three opened sea urchins with visible orange roe are arranged on a rocky surface next to two lemon halves, a glass of white wine, and a pocket knife, with the Mediterranean Sea in the background.

An underwater view of a Posidonia seagrass meadow growing on a sandy seabed with sunlight filtering through the clear blue water above.

A small pink lumpsucker fish clings to a rocky underwater wall covered in white soft corals and dark kelp in cold blue water.

A mottled olive and red sculpin rests on pink coralline algae in a shallow tidepool, illuminated by golden sunlight filtering through the rippling water surface.

A marine iguana grazes on green algae on a dark lava rock underwater, with sunlight filtering from above and creating a rim light effect on its scales.

A queen conch with a pink-lipped, algae-covered shell moves across a turtle-grass meadow on a sandy seabed, illuminated by low-angle sunlight.

A green snakelocks anemone with violet-tipped tentacles sits in a shallow, clear rock pool on pink coralline-covered rock, illuminated by dappled sunlight.

A pyjama shark with distinct dark stripes rests in a rocky crevice surrounded by sea urchins and kelp in an underwater reef setting with soft green light filtering from above.

A tide pool on a rocky shore features purple ochre sea stars and green sea anemones submerged in clear water, surrounded by pink coralline algae on the stone under soft, overcast lighting.

A cluster of vibrant orange sun coral polyps with fully extended tentacles attached to a dark underwater rock wall, illuminated by a light source from below against a deep blue background.

Several red cushion sea stars rest on the pale sandy seabed in clear, shallow water near mangrove roots, with sunlight creating rippling patterns on the seafloor.

A horn shark rests on a rocky reef surrounded by kelp forest with sunlight filtering through the water.

A dark red octopus rests on a rocky, textured seabed with its web flared, illuminated by ambient blue-green light filtering from above.

A seal swims through a kelp forest with sunbeams filtering through the water, creating a trail of bubbles as it turns toward the camera.

A red lionfish with fanned fins swims in dark water, illuminated by a single beam of light from above.

Golden sunlight filters through the surface of the water into a dense underwater kelp forest, illuminating the amber fronds and small fish swimming among the stalks.

A cluster of orange cup coral polyps with extended tentacles attached to a dark underwater wall, illuminated by side lighting against a black background.

A compass jellyfish with brown V-shaped markings on its pale bell drifts just below the water's surface, illuminated by golden hour sunlight from above.

A cluster of colorful Christmas tree worms in shades of blue, red, yellow, and white attached to a textured brain coral surface underwater.

A southern stingray swims over a shallow, rippled white sand seabed illuminated by bright sunlight creating caustic patterns.

A leafy seadragon with intricate leaf-like appendages swims over seagrass beneath a jetty, illuminated by sunbeams filtering through the blue-green water.

A vibrant coral reef wall teeming with diverse soft corals and sea fans is illuminated by sunlight filtering through the water, with a steep drop-off into deep blue water on the right.

A close-up macro view of a hedgehog's quills, showing the banded cream and brown texture of the spines emerging from the animal's skin under warm lighting.

A grey seal swims through a dense kelp forest underwater, illuminated by shafts of sunlight filtering from the surface.

A vibrant red starfish and several green sea anemones rest in a clear tide pool surrounded by kelp, with a foggy, sunlit coastline in the background.