Doris pseudoargus
Mantle usually yellow or buff-orange, often with large blotches of bright colours.
Variously sized, rounded, spiculose tubercles give stiff unyielding feel to mantle, but G. planata is even stiffer.
No whitish, papillate, acid glands on flanks of mantle.
Translucent gills often tinted purple or lilac
Length 60 mm, Menai Strait, March 2012, and Anglesey, May 2018 © A. Rowat.