Acanthina, common name the unicorn snails, is a genus of small predatory sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.

The inner lip is wide and flattened.

The outer lip is crenated, with a prominent tooth at the fore part.

[2] The species of Acanthina are most numerous on the South American coasts of the Pacific Ocean.

These snails live in the intertidal zone.