Diplocirrus glaucus is a species of marine polychaete found in ocean bottoms often consisting of mud, sand, shells or gravel.

It is found in the Arctic, Mediterranean, and the eastern North Atlantic oceans to a depth of 750 meters.

It has a spindle-shaped front body, changing to a more cylindrical form at the back end.

Body colour varies from pearl-grey to silver-white with a length up to 25 mm.

[2] It lives on the ocean floor where it digs tunnels that are supported by slime secreted from the worm.