Abstract / Introduction / Summary:
Three species of marine Protostomia [Eglisia sp. (Gastropoda: Epitoniidae), Critomolgus sp. (Copepoda: Rhynchomolgidae) and Ophryotrocha sp. (Annelida: Dorvilleidae)] were found from the veretillid sea pen Cavernulina sp. (Anthozoa: Pennatulacea) on muddy and sandy bottom in coastal waters of Amami Island, southern Japan. Of these invertebrates, the gastropod and the copepod might be symbionts associated with Cavernulina sp. because of findings of multiple individuals attached on sea pens.