Tenellia diversicolor is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Fionidae.[1]
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.[2]
Tenellia diversicolor feeds on a hydroid, a species of Aglaophenia, family Aglaopheniidae.