David Fleetham / Parasitic Scale worm (Gastrolepidia clavigera) on a Blackspotted sea cucumber (Bohadschia graeffei) off the island of Yap, Federated States of Micronesia.
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David Fleetham / Sea cucumber scale worm (Gastrolepidia clavigera) crawling on its host holothurian, the Black sea cucumber (Holothuria atra), Fiji.