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Palaemon macrodactylus
Image courtesy of Melissa Frey, Royal BC Museum, Canada
Palaemon macrodactylus
Taxonomic Group: Crustaceans-Shrimp


Palaemon macrodactylus, known as the Oriental Shrimp, is native to estuaries and coastal waters of the Northwest Pacific. Its range spans, Russia, Japan, and South Korea. It is a successful invader, being introduced to the East and West coasts of North America, England, the Netherlands, Belgium, Germany, Spain and Argentina.  It favors pilings, walls, debris, and other forms of shelter as habitat and is often most abundant in lower-salinity waters. Palaemon macrodactylus is sold as food in Japan, but only has minor economic value. Although it is omnivorous, P. macrodactylus predominantly feeds on invertebrates and therefore may compete with other caridean shrimps for food.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT. .
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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