European Green Crabs

greencrab_wtextHave you seen this ALIEN INVADER?

This is a European Green Crab (Carcinus maenus) and it is not welcome in Southeast Alaska waters! While this species is native to Europe, it has been spreading globally. Its note of distinction is being on the list of 100 worst invasive species in the world due to its impact on local ecosystems and human economies.

In Sitka, SALMoN is helping with Green Crab Watch, which is monitoring several locations throughout Alaska to keep an eye out for this alien invader. We are working with the Sitka Conservation Society, Sitka Sound Science Center, and NOAA; and operating under a permit with the Alaska Dept. of Fish and Game.

To learn more about this alien species, and potential impacts to native and commercial species, click this link.

Below is a video of deploying and retrieving traps:

clipboard-iconProtocols, Datasheets, and Identification tips are available at this Green Crab Watch link. Or click on the clipboard


folder-icon-Download-Royalty-free-Vector-File-EPS-3135DATA: Click on the folder to download data from our Sitka monitoring site


If you would like to volunteer with this (or any!) SALMoN Project, contact Scott Harris at

Below are a short video (University of Aberdeen Phd candidate Lynn Wilbur) and a photo gallery of setting traps at Sitka National Historical Park: