Pascal Kobeh / Barrel sponge (Xestospongia testudinaria) covered with Lampert's sea cucumbers (Synaptula lamperti). Crinoids and Feather stars (Crinozoa) also on Sponge. Jewel fairy basslets (Pseudanthias squami...

GEORGETTE DOUWMA / Lambert's worm sea cucumber (Synaptula lamperti) on a Giant barrel sponge (Xestospongia testudinaria) Komodo, Indonesia

GEORGETTE DOUWMA / Lampert's worm sea cucumbers (Synaptula lamperti) on sponge with crinoid, Papua New Guinea

GEORGETTE DOUWMA / Cauliflower coral (Dendronephthya klunzingeri) on sponge covered with synaptid sea cucumbers (Synaptula lamperti), Papua New Guinea

Pete Oxford / Sea Cucumber (Synaptula lamperti) group on Giant Barrel Sponge (Xestospongia sp), Raja Ampat Islands, Indonesia

Pete Oxford / Sea Cucumber (Synaptula lamperti) group on coral, Raja Ampat Islands, Indonesia

Pete Oxford / Sea Cucumber (Synaptula lamperti) group on coral, Raja Ampat Islands, Indonesia

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...

David Fleetham / Yellow elephant ear sponge (Ianthella basta) with dark-coloured Whiteline sea cucumbers (Synaptula lamperti) and the paler, unnamed species, Philippines.