Colus barbarinus is a species of sea snail, a marine gastropod mollusk in the family Colidae, the true whelks and the like.

[1] (Description as Colus (Aulacofusus) bristolensis) The small shell measures 23.5 mm.

The shell contains six rounded whorls and a very minute (decorticated) protoconch.

The axial sculpture consists of faint incremental lines.

[2] (Description as Colus (Aulacofusus) barbarinus) The length of the small, pale gray shell attains 20 mm.