For a long time, the invasive killershrimp with its two prominent humps was the prime suspect for the disappearance of species among its native relatives.
At the same time as the invasion of the killershrimp began in the early 1990s, the populations of many native invertebrates in the large waterways of Central Europe started to decline.
At the same time as the invasion of the killershrimp (Dikerogammarus villosus) began in the early 1990s, the populations of many native invertebrates in the large waterways of Central Europe, such as Gammarus pulex, started to decline.