Abstract
What seems likely to be the 1st published record of a foraminiferan protozoan (C. lobatulus) epizoic on an isopod (A. longicornis) is reported from material collected by divers off the Berwickshire coast (Scotland, UK). Notes are also provided on other epibionts and a comparison is made with Astacilla from the Clyde Sea area which proved to have a much lower incidence of fouling. There, fouling was due largely to the entroproct Barentsia sp. and the hydroid Clytia hemisphaerica, not to Cibicides.