Pascal Kobeh / Detail of a banded urchin (Echinotrix calamaris) with its anus clearly visible. Sulu Sea, Philippines.
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David Fleetham / Sea urchin crab (Echinoecus pentagonus), female inside Common banded urchin (Echinothrix calamaris) rectum. Hawaii.
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Georgette Douwma / RF - Calamari urchin (Echinothrix calamaris). Cebu, Malapascua Island, Philippines. (This image may be licensed either as rights managed or royalty free.)
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Georgette Douwma / Urchin (Echinothrix calamaris) Indonesia.
Georgette Douwma / Composite image of marine invertebrates on black background. Top row from left: Tube anemone (Ceriantharia), Yellow sea cucumber (Colochirus robustus), Nudibranch (Nembrotha lineolata), Squat shri...
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Georgette Douwma / Composite image of echinoderms on black background. top left to right: Pineapple sea cucumber (Thelenota ananas), Yellow sea cucumber (Colochirus robustus), Frianti's starfish (Nardoa frianti),...
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Georgette Douwma / Composite image of echinoderms on black background. SEA CUCUMBER row from left: Pineapple sea cucumber (Thelenota ananas), Leopard sea cucumber (Bohadschia argus), Yellow sea cucumber (Colochirus...
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Georgette Douwma / Composite image of echinoderms on black background. Species present: - Top row from left: Yellow sea cucumber (Colochirus robustus) and Lampert's sea cucumber (Synaptula lamperti), Black sea c...
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David Fleetham / Female Sea urchin crab (Echinoecus pentagonus) living in the rectum of the Common banded urchin, (Echinothrix calamaris), Hawaii, Pacific Ocean.
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David Fleetham / Juvenile Banded sea urchin, (Echinothrix calamaris) close up showing large, hollow banded spines; fine, sharp needle-like spines and the central anal sac, Hawaii, Pacific Ocean.
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David Fleetham / Banded sea urchin (Echinothrix calamaris) on a rock, Hawaii, Pacific Ocean.