Felimare tricolor is a small dorid nudibranch present in
the Mediterranean. It is usually found roaming on a black
sponge (Cacospongia sp.). This species is rare. It can be
confused with Felimare fontandraui.
Oral tentacles: 2 in number, very short. Rhinophores: Deep blue in colour with white tips, finely
lamellate and retractable. Cerata: Absent. Gills: Retractable, unipinnate, blue in colour with a yellow
line along the midrib (externally). Body: Blue to dark blue with a yellow submarginal line, a
central yellow line and two discontinuous lateral white
lines. Foot: Blue with a yellow lateral line extending towards
Size range: 14-16mm. Rare.
Specific characteristics: This species can be
distinguished from related species by its colouration
(yellow central line and discontinuous white lines).
Notes: This species is considered synonymous with F.
midatlantica by some (see note on Marine Species - link