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Description
Marionia (Vayssière, 1877) is an accepted genus of dendronotid nudibranchs in the family Tritoniidae. Species are known from the Mediterranean and Atlantic (Marionia blainvillea, up to 7 cm) and from the Indian Ocean and Red Sea (Marionia levis). They feed on soft corals and gorgonians; M. levis feeds on Parerythropodium fulvum and matches it in colour, and M. blainvillea feeds on Alcyonium, Eunicella and Paramuricea.
Identification
Branched gills form rows along each side of the back (up to 9-12 pairs in the species described), and the head carries an oral veil with lobes and finger-like projections. The rhinophores sit in sheaths. The body is elongate and its colour sometimes matches the coral it feeds on.
Species in this genus (2)
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