Recent establishment of the invasive Ponto-Caspian mysid (Hemimysis anomala G.O. Sars, 1907) in the Hungarian part of the Danube River.
The mysid shrimp, Hemimysis anomala G.O. Sars, 1907, has recently colonized the Hungarian reach of the Danube River. It has formed self-sustaining populations. The species has been found in samples collected in September 2004 almost one year earlier than the first record published.