Exomilus edychrous is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The colour of all specimens seen are faded, but appear to have been buff, the protoconch and spots on the lower whorls darker, the basal keel white.

Broader than the spirals are the perpendicular radials, fourteen on the body whorl, and proportionately fewer on the rest.

The aperture is contracted, straight above, flexed below, fortified by a broad strong varix, out of which a deeply notched subcircular anal sulcus is excavated.

[2] This marine species has a wide distribution: New Caledonia, Queensland, Australia; off Réunion and Southeast Africa