Aplidium cf. glabrum

This colonial ascidian is similar in zooidal morphology to the native Aplidium glabrum, but is found in warmer waters than are typical of the native species. Its origin and identity are unknown but it is widespread in the UK and throughout Europe. It is a threat to biodiversity and aquaculture through smothering, colonies could block inlet pipes. It is now entering natural habitats in the Tamar Estuaries area.

Environmental risk: LOW

Economic risk: LOW

Image: J. Bishop © MBA