Invasive demon shrimp found in River Churnet
An invasive species of shrimp has been found in a Staffordshire river.
Demon shrimp were first discovered in England less than five years ago, but the voracious predators have now made it into the River Churnet, Staffordshire Wildlife Trust said.
The shrimp threaten natives species. Volunteers from Churnet Valley Living Landscape Partnership have been monitoring the river.
There are an estimated 12,000 alien species in Europe and 2,000 in Britain.
However, only a minority are invasive and have seriously negative impacts.
In 2014, the European Parliament approved new legislation to stem the spread of invasive species by introducing a ban on the possession, transport, selling or growing of species deemed as of "Union Concern".
Since their arrival in England, the demon shrimp - Dikerogammarus haemobaphes - have already spread to lakes and waterways in several areas, researchers say.