Punk ferox is a species of aplacophoran mollusc known from the Homerian Coalbrookdale Formation of England.

[1] Punk is elongate and vermiform, with rounded anterior and posterior ends.

The dorsal surface bears a median ridge which widens near the anterior, with a low hump near the midpoint.

The posterior portion of Punk's trunk bears around 25 subconical projections near the median ridge, likely gills.

A thin plate is preserved inside this ridge, likely displaced from an unknown original position.