Trapania tartanella (Ihering, 1886)
White body with opaque white, yellow and orange markings.
1: single, backward pointing, elongate papilla at base of each rhinophore.
2: single elongate papilla on either side of the gills.
3: long propodial tentacle.
4: no veil with elongate processes on anterior edge of head.
5: long oral tentacles.
Cornwall October 2020. © D. Fenwick