Two keen-eyed anglers were the first to spot an unusual shrimp on Friday 3 September at Grafham Water and sent samples to the Environment Agency for identification. The shrimp was identified as possibly being dikerogammarus villosus, an invasive species, commonly known as the “killer shrimp”. This is the first time this shrimp has been found in England, all due to the keen eyes of anglers, proving once again that we are the eyes and the ears of the waterside.
The shrimp is a voracious predator. It kills a range of native species, such as native freshwater shrimps and even young fish. It often kills its prey but leaves it uneaten. It tends to dominate the habitats it invades, sometimes causing the extinction of native species.