Doridoxa Bergh, 1899 Doridoxidae, commonly known as doridoxid nudibranchs, are a small, enigmatic taxonomic family of shell-less sea slugs, marine gastropod molluscs in the clade Cladobranchia within the clade Nudibranchia.

[2] Doridoxidae is currently the only family in the superfamily Doridoxoidea, within the clade Pseudoeuctenidiacea (= Doridoxida).

Molecular evidence shows that it groups with the genera Doridomorpha and Heterodoris and the family Arminidae and close to Tritoniidae.

[3] The family Doridoxidae is a small family with only one genus Doridoxa and two species:[4] Species brought into synonymy: