Dikerogammarus villosus (Sowinsky, 1894)

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English Killer shrimp ISEIA: A0 – Alert List
Lëtzebuergesch n/a EASIN
Français Crevette tueuse Wikipedia: Wikipedia - English - Killer shrimp Wikipedia - Français - Crevette tueuse Wikipedia - Deutsch - Großer Höckerflohkrebs Nederlands
Deutsch Großer Höckerflohkrebs Wikispecies: n/a (2017)
Nederlands Pontokaspische Vlokreeft Back to the list of invertebrates

Report the species

Report Dikerogammarus villosus to the National Museum of Natural History.

Status and distribution in Luxembourg

Dikerogammarus villosus is not yet present in Luxembourg and has been listed in the Alert List.

The crustacean is an omnivorous predator tolerating a wide range of temperatures, salinity, oxygen concentration and different substrates. Through its aggressive behaviour and high voracity in invaded ecosystems, it is a serious threat for indigenous species. It feeds on other invertebrates and on eggs, larvae and, at times, even adults of fish species. It causes changes in the composition of invaded communities or even diminishes their biodiversity. The high fecundity of D. villosus supports its rapid expansion through Europe.

Risk assessment

ISEIA protocol: A0 (3+2+3+3) = Alert List (Ries et al. 2017: 68).


  • Ries, C., A. Arendt, C. Braunert, S. Christian, A. Dohet, A. Frantz, G. Geimer, M. Hellers, J. A. Massard, X. Mestdagh, R. Proess, N. Schneider & M. Pfeiffenschneider, 2017. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of invertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 119: 63-70. [PDF 360 KB]

 Page content last updated on 2019-12-10. Last proofread by Caroline Grounds on 2019-12-10.