Ophelina acuminata is a species of marine annelids, found in the sublittoral mud and sand bottom.

Colour yellowish or pearly grey with bright red gills, and all segments finely multi-annulated.

The prostomium is conical, ending in a median progress with a slightly swollen tip and two big dorsolateral nuchal-crevasses.

Anus surmounted by a spoon shaped hood with a ventral opening, 20 fine annular rings and 14-20 long papillae along edge.

On the ventral side of basis, two long cirrus, behind one unpaired longer cirri.