Mantle reflected (1) to expose head. Fine opaque stipple of mantle is absent from behind the rhinophores giving the impression of depressions (2), and a depressed, transparent, stipple-free circle behind the gills gives the illusion of an open pore (3). Yellow viscera visible within translucent body.
Inset: magnified unipinnate gill.
Juvenile, L. 7mm. ELWS, Menai Strait, Wales. August 2010.