Felimare tricolor is a colourful species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

Posteriorly Ortea, Valdes & Garcia-Gomez[5] selected a neotype for Cantraine's Doris tricolor and synonymized with it Hypselodoris midatlantica Gosliner, 1990.

Ortea et al.'s neotype selection is contested by Gosliner (see http://www.seaslugforum.net/find/3807), and thus, there are different opinions on the valid name for the taxonomical species involved.

The original description reads: Doris corpore elongato, levissimo, caeruleo; dorso tribus lineis longitudinalibus notato, duobus lateralibus aurantiacis, media albida.

[9] The development of the colour pattern is described by Ortea et al.[5] This species can reach a total length of at least 35 mm and has been observed feeding on sponges from the genus Dysidea as well as Scalarispongia scalaris.