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Asian Shore Crab

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Asian shore crab
Asian shore crab, adult - Photo by U.S. Geological Survey
Scientific Name: 
Hemigrapsus sanguineus (De Haan, 1853) (ITIS)
Common Name: 
Asian shore crab, Japanese shore crab, Pacific crab
Native To: 
East coast of Asia (Epifanio 2013)
Date of U.S. Introduction: 
First discovered in 1988 in the Delaware Bay (Epifanio 2013)
Means of Introduction: 
Possibly through ballast water (NAS Database)
Competes with native crustaceans and preys on other native species (NAS Database)
Current U.S. Distribution: 
Eastern U.S. coastal region

Distribution / Maps / Survey Status

DOI. USGS. Wetland and Aquatic Research Center.
Provides detailed collection information as well as animated map.


University of Georgia. Center for Invasive Species and Ecosystem Health.
Australian Plant Biosecurity Cooperative Research Centre. Pests and Diseases Image Library.


Google. YouTube; Tufts University.

Selected Resources

The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Asian Shore Crab.

IUCN. Species Survival Commission. Invasive Species Specialist Group.
Northeast Aquatic Nuisance Species Panel.

New York Invasive Species Clearinghouse.

Great Britain Non-Native Species Secretariat.

Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).

Federal Government

Smithsonian Institution. Smithsonian Environmental Research Center. Marine Invasions Research Lab.

DOI. USGS. Wetland and Aquatic Research Center.
Provides distribution maps and collection information (State and County).
International Government
Fisheries and Oceans Canada. Centre of Expertise for Aquatic Risk Assessment.
National System for the Prevention and Management of Marine Pest Incursions (Australia).
State and Local Government

Maine Department of Marine Resources.


University of Delaware. Delaware Sea Grant College Program.

See also: Delaware's Invasive Crabs for more story maps