2002-2003 Christopher W. Ashelby Stour and Orwell Ensis directus and Caprella mutica distribution record

A series of surveys of the Stour and Orwell estuaries, Harwich Harbour and the deep-water approaches to the Harbour has highlighted the presence of a number of non-native species. The distribution and abundance of non-native macrofauna in the area are discussed. New records of one nonnative and one cryptogenic species are presented.