Trinchesia diversicolor is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.Rosenberg, G. (2014). Cuthona diversicolor (Baba, 1975). Accessed through: World Register of Marine Species on 2015-02-02Korshunova T.; Fletcher K.; Martynov A. (2025). The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case Zoological Journal of the Linnean Society, Volume 204, Issue 4, August 2025, zlaf057,
Distribution This species was described from the shore of Akasumi, west coast of the Noto Peninsula, Japan. The original description contains records from the Japan Sea coast of Middle Japan: Sado Island, Toyama Bay and Oki Island, Shimane Prefecture. Also reported from South Korea and Hong Kong.Rudman, W.B., (2001 August 9) Cuthona diversicolor Baba, 1975. [In] Sea Slug Forum. Australian Museum, Sydney.
Ecology Trinchesia diversicolor feeds on a hydroid, a species of Aglaophenia, family Aglaopheniidae.
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