Tony Phelps / Erica species, very rare, DeHoop Nature Reserve, Western Cape, South Africa

Pete Oxford / Blackspotted sea cucumber (Bohadschia graeffei) on coral reef, Fiji, South Pacific.

Pete Oxford / Sea Cucumber (Bohadschia graeffei), Fiji

Pete Oxford / Sea Cucumber (Bohadschia graeffei) on coral reef, Fiji

Georgette Douwma / Graeff's sea cucumber (Bohadschia graeffei) has climbed on top of a coral boulder to spawn, Andaman Sea, Thailand

Georgette Douwma / Graeff's sea cucumber (Bohadschia graeffei) has climbed on top of a coral boulder to spawn, Andaman Sea, Thailand

Georgette Douwma / Graeff's sea cucumber (Bohadschia graeffei) has climbed on top of a coral boulder to spawn, Andaman Sea, Thailand

Georgette Douwma / Graeff's sea cucumber (Bohadschia graeffei) Andaman Sea, Thailand.

Juergen Freund / Graeff's sea cucumber (Bohadschia graeffei) Kimbe Bay, West New Britain, Papua New Guinea

Juergen Freund / Prickly Sea Cucumber (Bohadschia graeffei) feeding on seabed, Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Graeff's sea cucumber (Bohadschia graeffei) Indonesia

Sue Daly / Sea cucumber (Bohadschia graeffei) Lembeh Straits, Sulawesi, Indonesia

Fred Bavendam / Sea Cucumber (Bohadschia graeffei) spawning, Great Barrier Reef, Australia

Georgette Douwma / Sea cucumber (Bohadschia graeffei) on coral reef with a Sea apple, sponges and crinoids, Rinca, Indonesia

Juergen Freund / Dried and shrunken Sea cucumber {Bohadschia graeffei} formerly 1-2 feet long, Sulawesi, Indonesia

Juergen Freund / Dried and shrunken Sea cucumbers {Bohadschia graeffei} formerly 1-2 feet long, Sulawesi, Indonesia

Fred Bavendam / Sea Cucumber (Bohadschia graeffei) male, standing up to release sperm during spawning, Milne Bay, Papua New Guinea

Juergen Freund / Sea cucumber on sea bed. {Bohadschia graeffei} Indo-Pacific ocean

Tom Vierus / Graeffe's sea cucumber (Pearsonothuria graeffei) on a coral bommie near 'Shark Point', Munda, Western Province, New Georgia, Solomon Islands, Pacific Ocean.

David Fleetham / Parasitic Scale worm (Gastrolepidia clavigera) on a Blackspotted sea cucumber (Bohadschia graeffei) off the island of Yap, Federated States of Micronesia.

David Fleetham / Adult Graeff's Sea Cucumber (Pearsonothuria graeffei) feeding, Yap, Micronesia.

Sirachai Arunrugstichai / Graeff's sea cucumbers (Bohadschia graeffei) extend their bodies to spawn on top of coral bommie, releasing gametes into the flowing current at Hin Daeng Pinnacle, Mu Koh Lanta National Park, Krabi Pr...

Sirachai Arunrugstichai / Graeff's sea cucumbers (Bohadschia graeffei) extend their bodies to spawn on top of coral bommie, releasing gametes into the flowing current at Hin Daeng Pinnacle, Mu Koh Lanta National Park, Krabi Pr...

David Fleetham / Graeff's sea cucumber (Pearsonothuria graeffei) showing the tentacles of this adult Holothurian feeding. Fiji.