Nomes alternativos: Cratena peregrina
Pilgrim hervia, or Cratena peregrina, is a species of aeolid sea slug that grows to about 3-5 cm. This milky white-colored sea creatures has has a thin body with a pointed tail, and features 8-10 clusters of colored dorsal cerata. The head has a pair of rhinophores and two long buccal tentacles.
The pilgrim hervia can be found in the Mediterranean Sea and the eastern Atlantic Ocean.