The Asian Clam (Corbicula fluminea (O.F. Müller)) (Cyrenidae) arrives in the Erne River.
The distribution of the Asian Clam was examined in the region within the navigation from below Belturbet to Crom Quay in Upper Lough Erne. The clam was only found in a 3.5 km section of the Erne River at low densities from below Belturbet to Foalies Cut. Clams were retrieved over a wide range of substrata ranging from mud and plant detritus to hard stony bottoms. The greatest densities were from a coarse gravel patch at densities estimated at 10 to 100 per square metre. There would appear to be three or four year classes present with clams ranging from 5 mm to 22 mm shell length. This clam can result in changes to benthic communities and habitats and is expected to spread to other river catchments.