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Echinogammarus ischnus
Image courtesy of Adriana Radulovici, Biodiversity Institute of Ontario via and the CC BY-NC-SA 3.0 license
Echinogammarus ischnus
Taxonomic Group: Crustaceans-Amphipods


Echinogammarus ischnus is a fresh and brackish water gammarid amphipod which is native to the Black and Caspian Sea basins. It is introduced in parts of Europe (Poland and Lithuania) and North America. In North America, populations are known from the Great Lakes, St. Lawrence River, upper Mississippi river, and a number of lakes in Ohio and New York. It may have been introduced with Zebra or Quagga mussels, its preferred habitat in its introduced range. Throughout its global distribution it tolerates a wide range of temperature and salinities, but is sensitive to water of low ionic content or conductivity. In some introduced locations it has replaced the native amphipod Gammarus fasciatus.

* Content for this species is based on the literature and peer review is pending - if you have comments or feedback please contact Paul Fofonoff at

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
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