Georgette Douwma / Pineapple sea cucumber (Thelenota ananas) on coral reef, West Papua, Indonesia.

Georgette Douwma / Pineapple sea cucumber (Thelenota ananas) Similan Islands, Andaman Sea, Thailand.

Fred Bavendam / Pineapple Sea Cucumber (Thelenota ananas) crawling through algae, Kimbe Bay, Papua New Guinea

Norbert Wu / Pineapple Sea Cucumber (Thelenota ananas), Solomon Islands

Norbert Wu / Pineapple Sea Cucumber (Thelenota ananas) near urchins, Solomon Islands

GEORGETTE DOUWMA / Pineapple sea cucumber (Thelenota ananas) on coral reef. Andaman Sea, Thailand

GEORGETTE DOUWMA / Pineapple sea cucumber (Thelenota ananas) on seabed, Andaman Sea, Thailand

GEORGETTE DOUWMA / Pineapple sea cucumber (Thelenota ananas) on seabed, Andaman Sea, Thailand

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),...

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...

Magnus Lundgren / Wild Wonders of China / Pineapple sea cucumber (Thelenota ananas) Green Island, Taiwan. Endangered species.