Georgette Douwma / Black sea cucumber (Holothuria atra) rearing up and releasing eggs and sperm. Andaman Sea, Thailand.
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Georgette Douwma / Black sea cucumber (Holothuria atra) rearing up and releasing sperm. Andaman Sea, Thailand.
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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 / Sea cucumber scale worm (Gastrolepidia clavigera) crawling on its host holothurian, the Black sea cucumber (Holothuria atra), Fiji.
