Disclaimer:

The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.




Eriocheir sinensis
(Chinese mitten crab)
Crustaceans-Crabs
Exotic
Translate this page with Google
Français Deutsch Español Português Russian Italiano Japanese

Copyright Info
Eriocheir sinensis

Common name: Chinese mitten crab

Taxonomy: available through www.itis.govITIS logo

Identification:

Adult Characteristics:
                + hairy claws with white tips, normally equal in size
                + notch between the eyes
                + four lateral carapace spines (fourth spine is small)
                + smooth, round carapace or body shape
                + maximum carapace width (distance across the back) is approximately 80 mm (3 inches)
                + legs over twice as long as the carapace width
                + light brown color

Juvenile Mitten Crab Characteristics:
                + notch between the eyes
                + claws may not be hairy if carapace width is less than 20 mm (¾ inch)
                + claws are hairy by 25 mm (1 inch) carapace width
                + four lateral carapace spines (fourth spine is small)
                + smooth, round carapace or body shape
                + legs over twice as long as the carapace width
                + light brown color 

http://www.delta.dfg.ca.gov/mittencrab/identification.asp

Size: 3 inch carapace width

Native Range: Pacific coast of China and Korea.

US auto-generated map Legend USGS Logo
Alaska auto-generated map
Alaska
Hawaii auto-generated map
Hawaii
Caribbean auto-generated map
Puerto Rico &
Virgin Islands
Guam auto-generated map
Guam Saipan
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Eriocheir sinensis are found here.

StateYear of earliest observationYear of last observationTotal HUCs with observations†HUCs with observations†
Alaska200420041Prince of Wales
California1991200510Honcut Headwaters-Lower Feather; Lower Sacramento; Rock Creek-French Camp Slough; Sacramento-Stone Corral; San Francisco Bay; San Joaquin Delta; San Pablo Bay; Suisun Bay; Upper Deer-Upper White; Upper Merced
Connecticut201220141Saugatuck
Delaware200720102Brandywine-Christina; Broadkill-Smyrna
Louisiana198719871Eastern Louisiana Coastal
Maryland200520074Chester-Sassafras; Gunpowder-Patapsco; Severn; Upper Chesapeake Bay
New Jersey200820103Lower Hudson; Mullica-Toms; Sandy Hook-Staten Island
New York200720104Hudson-Wappinger; Lower Hudson; Middle Hudson; Sandy Hook-Staten Island
Ohio197520071Lake Erie
Oregon200220021Coos
Washington199720022Lower Columbia; Lower Columbia-Clatskanie

Table last updated 5/25/2018

† Populations may not be currently present.


Means of Introduction: Ballast water on the West Coast and in the Great Lakes. Its presence in Maryland may either be due to releasing crabs purchased as food (only males are sold), or they may be been introduced by ballast water.

Status: They are established on the California coast, but adults are now rare in San Francisco Bay as of 2012. There is no evidence to show they are establised in the Great Lakes. However, with all the recent collections from the mid-Atlantic Region of the east coast of the United States, reproduction may be occurring. Until 2007, all mitten crabs collected were males. Since then several female specimens were collected, each containing eggs and sperm stored in a special organ. This is evidence of mating but not necessarily of an established population.

Other Resources:
Eriocheir sinensis (Chinese mitten crab) (Gulf of Mexico Program)

USGS Invasive Species Case File

Eriocheir sinensis [Chinese mitten crab] (ANS Clearinghouse Bibliography)

Eriocheir sinensis (Global Invasive Species Database)

Chinese Mitten Crab: Written Documents (California Central Valley Bay-Delta Branch)

Eriocheir sinensis National Exotic Marine and Estuarine Species Information System (Smithsonian Environmental Research Center)

US Fish and Wildlife Service Ecological Risk Screening Summary for Eriocheir sinensis

Author: Benson, A. J., and P. L. Fuller

Revision Date: 8/7/2012

Citation Information:
Benson, A. J., and P. L. Fuller, 2018, Eriocheir sinensis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=182, Revision Date: 8/7/2012, Access Date: 9/21/2018

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logoU.S. Department of the Interior | U.S. Geological Survey
URL: https://nas.er.usgs.gov
Page Contact Information: Pam Fuller - NAS Program (pfuller@usgs.gov)
Page Last Modified: Wednesday, September 19, 2018

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [9/21/2018].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. For queries involving fish, please contact Pam Fuller. For queries involving invertebrates, contact Amy Benson.