Doris tricolor is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Dorididae.MolluscaBase eds. (2021). MolluscaBase. Doris tricolor (Baba, 1938). Accessed on 2021-04-08.

Distribution This species was described from Japan. It was later redescribed and compared with Doris sugashimae.Baba, K. (1998). Anatomical review of Archidoris tricolor (Baba, (Opistobranchia: Nudibranchia: Dorididae) with the description of a new species from Japan. Venus, Japanese Journal of Malacology. 57(3): 155-160. It has been reported from 2 m depth at Kazino hama, Jogashima, Miura Peninsula.2019, Doris tricolor (Baba, 1938) SeaSlug World

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