The Chromodorididae, or chromodorids, are a taxonomic family of colorful, sea slugs; dorid nudibranchs in the superfamily Doridoidea. “Chromodorid nudibranchs are among the most gorgeously colored of all animals.” The over 300 described species are primarily found in tropical and subtropical waters, as members of coral reef communities, specifically associated with their sponge prey. The chromodorids are the most speciose family of opisthobranchs. They range in size from <1mm to over 30 cm, although most species are approximately 2-3 cm in size.  (These are marine gastropod mollusks.
Although, they have a worldwide distribution, most species are found in the Indo-Pacific region. A scientific paper published in 2007, found the most widespread chromodorid genera, (Mexichromis, Chromodoris, Glossodoris and Hypselodoris) to be paraphyletic or polyphyletic.
A comprehensive phylogeny of the chromodorid nudibranchs found every one of the 14 traditional chromodorid genera were either non-monophyletic, or rendered another genus paraphyletic. Additionally, both the monotypic genera Verconia and Diversidoris are nested within clades. The authors presented a new classification of the chromodorid nudibranchs, which used molecular data to untangle evolutionary relationships and at the same time retains a historical connection to traditional systematics by using generic names attached to type species as clade names. All Chromodorid nudibranchs feed on sponges.
The family Cadlinidae Bergh, 1891 has been considered a synonym of the Chromodorididae. Research by R.F. Johnson in 2011  has shown that Cadlina does not belong to the family Chromodorididae. She has therefore brought back the name Cadlinidae from synonymy with Chromodorididae. The chromodorid nudibranchs without Cadlina are now monophyletic and turn out to be a possible sister to the family Actinocyclidae. "Cadlina" and "Aldisa" are the only two genera currently classified in the "Cadlinidae".
Genera within the family Chromodorididae include:
- Ardeadoris Rudman, 1984
- Berlanguella Ortea, Bacallado & Valdés, 1992 (although this has not been properly investigated)
- Cadlinella Thiele, 1931
- Ceratosoma J. E. Gray and M. E. Gray, 1850
- Chromodoris Alder and Hacock, 1855 - the type genus
- Diversidoris Rudman, 1987
- Doriprismatica d'Orbigny, 1839
- Felimare Ev. Marcus & Er. Marcus, 1967
- Felimida Marcus, 1971
- Glossodoris Ehrenberg, 1831
- Goniobranchus Pease, 1866
- Hypselodoris Stimpson, 1855
- Mexichromis Bertsch, 1977
- Miamira Bergh, 1874
- Noumea Risbec, 1928
- Thorunna Bergh, 1878
- Tyrinna Bergh, 1898
- Genera brought into synonymy
- Actinodoris Ehrenberg, 1831 : synonym of Chromodoris Alder & Hancock, 1855
- Babaina Odhner in Franc, 1968 : synonym of Thorunna Bergh, 1878
- Casella H. Adams & A. Adams, 1854 : synonym of Glossodoris Ehrenberg, 1831
- Chromolaichma Bertsch, 1977 : synonym of Glossodoris Ehrenberg, 1831
- Crepidodoris Pagenstecher, 1877 : synonym of Glossodoris Ehrenberg, 1831
- Digidentis Rudman, 1984 : synonym of "Thorunna"
- Durvilledoris Rudman, 1984 : synonym of "Mexichromis"
- Jeanrisbecia Franc, 1968 : synonym of Risbecia Odhner, 1934
- Lissodoris Odhner, 1934 : synonym of Chromodoris Alder & Hancock, 1855
- Orodoris Bergh, 1875 : synonym of Ceratosoma Gray, 1850
- Pectenodoris Rudman, 1984 : synonym of 'Mexichromis"
- Pterodoris Ehrenbegh, 1831 : synonym of Hypselodoris Stimpson, 1855
- Risbecia Odhner, 1934 : synonym of 'Hypselodoris"
- Rosodoris Pruvot-Fol, 1954 : synonym of Glossodoris Ehrenberg, 1831
- Verconia Pruvot-Fol, 1931 : synonym of Noumea Risbec, 1928
- Bouchet, P. (2011). Chromodorididae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=23003 on 2011-04-05
- Edmunds M (1981) Opishtobranchiate Mollusca from Ghana: Chromodorididae. Zoological Journal of the Linnean Society 71: 175–201.
- Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479 http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0033479
- Gosliner, T.M., Behrens, D.W. & A. Valdes (2008) Indo-Pacific Nudibranchs and Sea Slugs: A field guide to the World's most diverse fauna. Sea Challengers Natural History Books and the California Academy of Sciences.
- Turner LM, Wilson NG (2008) Polyphyly across oceans: a molecular phylogeny of the Chromodorididae (Mollusca, Nudibranchia). Zoologica Scripta 37: 23–42.
- Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479
- Johnson R.F. (2011) Breaking family ties: taxon sampling and molecular phylogeny of chromodorid nudibranchs (Mollusca, Gastropoda). Zoologica Scripta 40(2): 137-157
- Bouchet, P. (2011). Chromodorididae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=23003
- Rudman W.B. (1984) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: a review of the genera. Zoological Journal of the Linnean Society 81 (2/3): 115-273.
- Bouchet P. & Rocroi J.-P. (2005) Classification and nomenclator of gastropod families. Malacologia 47(1-2): 1-397. page(s): 49
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