[3] Graeffe's sea cucumber is found in the tropical Indo-Pacific Ocean and the type locality is Viti Island, Fiji.

By contrast, the juveniles are brightly coloured, being white and blue or black, with a few large, yellow, thornlike projections.

The appearance of the juvenile sea cucumbers begins to change when they grow larger than the slug and the mimicry is no longer effective.

[6] Its daily activities start within a few minutes of dawn and continue until half an hour after sunset after which time it adopts an inactive stance with its rear end raised and its tentacles retracted into its mouth.

[8] When threatened or disturbed, many sea cucumbers eject cuvierian tubules, thin white sticky strands of viscera, from their cloacas.