Wikipedia
Cerberilla
Cerberilla is a genus of sea slugs, aeolid nudibranchs, shell-less marine gastropod mollusks in the family Aeolidiidae.
All Cerberilla species have a broad foot and the cerata are numerous, arranged in transverse rows across the body. They live on and in sandy substrates where they burrow beneath the surface and feed on burrowing sea anemones.
The taxonomic status of this genus remains unrevised.