Office of the Governor (Washington).
Washington Governor Jay Inslee has issued an emergency order (PDF| 174 KB) to address the exponential increase in the European green crab population within the Lummi Nation’s Sea Pond and outer coast areas. The European green crab is a globally-damaging invasive species that, if they become permanently established, will particularly harm endangered species, impact resources that are part of the cultural identity of the tribes and native peoples, and affect small businesses.
National Science Foundation.
The green crab, Carcinus maenas, is a widely distributed invasive species that eventually alters its new environment. It's assumed that such species have high genetic diversity, or a variety of characteristics allowing them to adapt and thrive. But the green crab has low genetic diversity, while still spreading rapidly in a new part of the world. A U.S. National Science Foundation-funded study led by Carolyn Tepolot of the Woods Hole Oceanographic Institution is investigating the adaptive mechanisms of the green crab along the west coast of North America, where it has shown extensive dispersal in the last decade despite minimal genetic diversity. The results are published in Molecular Ecology. The project is a collaboration among scientists at WHOI, Portland State University, the Smithsonian Environmental Research Center and the University of California, Davis.
DOC. NOAA. Fisheries.
Natural resource managers in British Columbia discovered several adult male and female European green crabs on Haida Gwaii this past July. Alarm bells immediately went off for biologists in Alaska. The archipelago of Haida Gwaii, off the coast of Prince Rupert in British Columbia, is very close to Alaska. The July discovery is the closest confirmed finding of the invasive crustacean since it was first detected in the San Francisco Bay area in 1989.
Google. YouTube; EarthFix Media.
Google. YouTube; Fisheries and Oceans Canada.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for European Green Crab.
Council or Task Force
Washington State Recreation and Conservation Office. Washington Invasive Species Council.
San Francisco Estuary Institute; Center for Research on Aquatic Bioinvasions.
Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).
Texas State University System. Texas Invasive Species Institute.
DOC. NOAA. Fisheries.
The green crab is considered one of the most invasive species in the marine environment. It has few predators, aggressively hunts and eats its prey, destroys seagrass, and outcompetes local species for food and habitat. Green crab could potentially damage Alaska’s multi-billion dollar fisheries industries, especially for salmon, crab, and mariculture operations. Thankfully, no green crabs have yet been detected in Alaskan waters, but concerned Alaskans have been planning for the arrival of these voracious crustaceans. There are three simple steps you can take to help find, remove and report these crabs on your local beaches. Find it, Keep it, Freeze it!
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).
Fisheries and Oceans Canada.
New South Wales Department of Primary Industries (Australia).
State and Local Government
University of Delaware. Delaware Sea Grant College Program.
See also: Delaware's Invasive Crabs for more story maps
Prince William Sound Regional Citizens' Advisory Council.
- Carlton, J.T. and A.N. Cohen. 2003. Episodic global dispersal in shallow water marine organisms: the case history of the European shore crabs Carcinus maenas and C. aestuarii. Journal of Biogeography 30(12):1809-1820.
- Grosholz, E. and G. Ruiz. 2002. Management Plan for the European Green Crab (PDF | 517 KB) Submitted to the Aquatic Nuisance Species Task Force by the Green Crab Control Committee.
- Integrated Taxonomic Information System. Carcinus maenas. [Accessed Sep 10, 2014].