Felimare fontandraui is a medium sized chromodorid
nudibranch present in the Mediterranean and Eastern
Atlantic Ocean. It is usually found roaming on sponges
(often on Dysidea sp.). This species is common and often
encountered. It is sometimes distinct enough to be
identified in the field, however some forms may be
misinterpreted as F. tricolor or F. villafranca.
Oral tentacles: 2 in number, very short. Rhinophores: Deep blue to purplish in colour with a faint
yellow line along the centre, finely lamellate and
retractable. Cerata: Absent. Gills: Retractable, unipinnate, dark bluish purple in colour
with a faint yellow line along the midrib (externally). Body: Blue to purple; a pale yellow to yellow submarginal
to marginal line is present along with at least one central
white to yellow branched line. The species is very
variable and several white to yellow lines may be present. Foot: Pale purplish to bluish in colour and with yellowish
short lines/dots along the sides; without appendages.
Size range: 4-21mm. Common.
Specific characteristics: This species can easily be
confused with related species F. tricolor and F.
villafranca. Some specimens previously identified as
Hypselodoris messinensis have been placed in this