Grey Sea Slug - Aeolidia papillosa

The Grey Sea Slug, Aeolidia papillosa, grows to about 12cms and is common subtidally on all rocky shores around the UK. Like many nudibranchs, it is a specialised feeder and lives entirely on sea anemones, biting chunks out of their columns. Seen here, not surprisingly therefore, on a bed of sea anemones. Colours range from grey to a reddish brown.