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

[1] The back has two parallel lines of yellow-orange colour, which go from the gill to the rhinophores, without passing between them, but continuing in an arc in front.

The general colour of the body is light blue, with a darker zone between the two yellow lines on the back.

[1] This species can be characterised by the pattern of yellow-orange lines on the back and flanks, the absence of mantle glands and the acicular form of the rodlets of the labial armature.

The lack of yellow pigment in the rhinophores allows the visual differentiation of this species from other animals of the North Atlantic with two lines on the back.