Lateral view of Flabellina pedata.
Species

Photographer / copyright holder
I.F. Smith
Length 10mm. On rocky shore exposed to strong currents, ELWS, Menai Strait, Wales. March 2011. Found by Debbie Evans.
Cuthona nana, L.8mm. Cerata extend forward of rhinophores in adults. Dark cerata reported to result from feeding on female, rather than male, Hydractinia. LWS (on rock; not on Hermit crab). Orkney, Scotland. August 1976. det. T.E.Thompson.
Species

Photographer / copyright holder
I.F. Smith
Length 8mm. Note that cerata extend in front of rhinophores.