Devon Wildlife Trust
Sea slug
This large sea slug is anything but dull!
Scientific name
Aeolidia filomenaeWhen to see
April to OctoberSpecies information
About
This large species of ‘nudibranch’ sea slug feeds on a wide variety of sea anemones! They can lay up to 400,000 eggs on the underside of rock in a beautiful ribbon-like formation.How to identify
This large sea slug usually has grey, brown or fawn colouration. It is covered in lots of floppy projections unique to nudibranchs, known as ‘cerata’. It also has a white V-shaped mark on the front of its head. If you are recording your sightings as part of a recording scheme, make sure to include clear photographs to help verifiers confirm your sighting.Distribution
Common around the British Isles and Ireland, as well as colder northern waters of EuropeDid you know?
Not only is this sea slug able to eat sea anemones without getting stung, but it can actually reproduce the anemone’s stinging cells into its own body for protection!How people can help
Always follow the Seashore Code when rockpooling, taking care where you walk and making sure you put animals and rocks back gently. The Wildlife Trusts are working with sea users, scientists, politicians and local people towards a vision of 'Living Seas', where marine wildlife thrives.
Mark Hamblin/2020VISION
As a charity we rely on memberships
Memberships help us campaign for better protection and management of our seas.
Mark Hamblin/2020VISION
Seas in crisis
Plastic-strewn beaches, fisheries on the verge of collapse and the ever growing effects of global climate change.