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Grandidierella japonica
Image courtesy of Göteborg Natural History Museum via and the CC BY-NC-SA 2.0 license.
Grandidierella japonica
Taxonomic Group: Crustaceans-Amphipods


Grandidierella japonica is an estuarine gammarid amphipod which builds U-shaped tubes on muddy substrates. It is native to the Northwest Pacific from Japan, China and Russia. Introduced populations are known from the West coast of North America, Australia, England and France. It often occurs in brackish estuaries, in fine mud, and sometimes in oyster beds and fouling. It is a widespread and abundant invader in California, but its impacts are not well-studied.

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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
Smithsonian Environmental Research Center

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