(Semper, 1868)
0. grisea is a sea cucumber with variable colour. It may be white, green, grey, or red. It is a medium to large species (to 900 mm) with 15-17 tentacles. Its spicules are anchors with knobs on the vertex and plates with a sharp posterior constriction. It is found on reefs, below rocks of reef flats and deeper.
Remarks: There are records also of australiensis and ramispicula : but there is doubt as to the distinction between the species of Opheodesoma, though glabra is recorded with smaller (<275,um), narrower (half of length) anchors than grisea.
See Rowe and Doty, 1977 for a discussion of the problems with this and related species.