Inermicosta inermicosta is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.

[1] Shell size 20-25 mm.

This species is distributed in the Western Atlantic Ocean along Gabon and Angola.

Trawled on sandy mud bottom at 30-40 metres depth off Rivers State, Nigeria.

This Ocenebrinae-related article is a stub.