- Green crabs have already invaded Washington's shorelines. Now they're heading to Alaska. The discovery, which experts say is likely tied to warming waters because of climate change, threatens Alaskan economies, ecosystems and long-standing ways of life. https://www.nbcnews.com/science/environment/green-crabs-already-invaded-washingtons-shorelines-now-re-coming-alask-rcna44927 42 comments environment