New resource available to identify non native freshwater shrimps and isopods

"The Killer Shrimp is just one of the non-native crustaceans that arrived in Great Britain after invading into Europe. To help raise awareness of this and other species and support detection, Defra have funded the Freshwater Biological Association to produce an identification guide to existing and potential new invaders. "

Booklet is free to download from:

https://secure.fera.defra.gov.uk/nonnativespecies/news/index.cfm?id=77