David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) on a reef, with two swimmers free diving in background, Molokini Marine Preserve, Maui, Hawaii, Pacific Ocean.
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David Fleetham / Needle-spined urchin (Echinostrephus aciculatus) attached to a rock on the seabed, Hawaii, Pacific Ocean.
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David Fleetham / Needle-spined urchin / Red rock boring urchin (Echinostrephus aciculatus) on a rock, Hawaii, Pacific Ocean.
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David Fleetham / Slate pencil sea urchin (Heterocentrotus mammillatus) on a reef with Black triggerfish (Melichthys niger) and a Bluestripe snapper (Lutjanus kasmira) swimming above, Maui, Hawaii, Pacific Ocean.
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David Fleetham / Coral reef with Slate pencil sea urchins (Heterocentrotus mammillatus), Pennantfish (Heniochus diphreutes) and Pyramid butterflyfish (Hemitaurichthys polylepis) and a diver holding a light, Hawaii. Mo...
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David Fleetham / Slate pencil sea urchin (Heterocentrotus mammillatus) close up of shell and spines, Pacific Ocean, Hawaii, USA.
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David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) on coral reef with two female free divers in the background, Molokini Marine Preserve, Maui, Hawaii. Model released.
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David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) and Bluefin trevally (Caranx melampygus), Hawaii.
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David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) on coral reef with Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.
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David Hall / Marine invertebrates including Crimson anemones (Cribrinopsis fernaldi), Painted anemones (Urticina crassicornis), Red soft coral (Gersemia rubriformis), Red sea urchins (Strongylocentrotus franciscan...
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David Hall / Puget sound king crab (Lopholithodes mandtii) and Red sea urchins (Strongylocentrotus franciscanus), Deserter Group, Queen Charlotte Strait, British Columbia, Canada. September.
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David Fleetham / Underside of a slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii.
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David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) Pennantfish (Heniochus diphreutes) and Pyramid butterflyfish, (Hemitaurichthys polylepis) swim through the background. Hawaii.
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David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) in Hawaiian reef scene with Black triggerfish (Melichthys niger) Hawaii.
