An uncommon nudibranch around the UK, Favorinus blianus is found more in the north. It has thickly bunched, narrow cerata and can be white, creamy-white or faintly buff with a maximum size of about 2cms. Usually seen in the Spring, it feeds on the eggs of other nudibranchs - here those of Onchidoris bilamellata.
St. Abbs Marine Reserve. North Sea. Scotland