A member of the genus Foettingeria and various hypotrichous ciliates commonly occur in association with the sea anemone Bunodosoma cavernata Bosc from waters near Galvston Island, Texas. The Foettingeria species show a few differences from specimens of F. actiniarum from Roscoff, France, and apparently depends on the anenome for completion of its life cycle, as determined by Chatton and Lwoff. The hypotrich ciliates observed in association with the same host include Euplotes, Unonychia, Aspidisca, Oxytricha and Paraeuplotes. The symbionts were observed to undergo variations in occurrence and abundance. The more common forms are described and illustrated.