Acanthochitidae Acanthochitonidae is a family of marine mollusks belonging to the class Polyplacophora, commonly known as chitons.

Acanthochitonidae are characterized by a broad girdle covered in coarse spines with erect tufts of up to ten large bristles.

Acanthochitonidae chitons are found in a variety of marine habitats, including rocky intertidal zones, coral reefs, and seagrass beds.

Several species of Acanthochitonidae chitons are of conservation concern, particularly in areas where they are heavily harvested for food or decorative purposes.

Molecular phylogenetic studies have helped to clarify the relationships between different taxa within the family, and have led to the establishment of several new genera.