This species is originally native to the Ponto-Caspian region, and has since expanded its range across Europe, becoming a common component of many lakes and rivers (Mastitsky 2007, Tyutin and Slynko 2010). The invasion of species from the Ponto-Caspian region throughout Europe has been facilitated via inland migration corridors (Bij de Vaate et al. 2002) and the main range extension of this species has taken place in the 19th to 20th century (Mouthon 2007). The recent expansion in north-east Europe is spectacular; having been introduced in the Volga delta in the 1990s, the species has presently reached a number of deltas in the Upper Volta (Tyutin and Slynko 2007). This species is widespread, occuring from eastern France and the Netherlands, to Ukraine and Russia, north to Latvia and south to Bosnia and Herzegovina.