Dikerogammarus haemobaphes

Dikerogammarus haemobaphes is a species of freshwater gammarid crustacean. These gammarids are commonly known as demon shrimp, likely because they are an extremely successful invasive species.

Native to the Ponto Caspian basin, Dikerogammarus haemobaphes expanded their range in 1955. This expansion began in Lake Balaton, Hungary and then spread into certain rivers and lakes in Austria, Belgium, Germany, Poland, Russia, Ukraine, and the United Kingdom. These crustaceans likely broadened their range due to the interconnection of waterways in Europe and the use of transportation vectors such as boats and ships.