There are many types of crabs that are green in colour, but only the European green crab has five spines on the outside of each eye. The aggressive invasive species was discovered in Skidegate Inlet; and now working group formed to decide next steps.

As ocean temperatures trend warmer than average, green crab larvae dispersed in ocean currents from more southern latitudes will find more suitable habitat along the Alaska coast. Recently, adult green crabs have been detected in Skidegate Inlet on Haida Gwaii, British Columbia, and larval crabs have been found in Prince Rupert, both less than 100 miles south of Ketchikan.