You Won’t Believe How Much These Invaders Are Changing Oregon’s Coast Every time I head to the beach, I’m keeping an eye out for more than just cool marine life. I’m also watching for invasive species. European green crabs rip up eelgrass beds, compete with native crabs, and prey on shellfish like clams, oysters, and even young crabs. Those eelgrass beds are underwater nurseries that countless marine animals depend on. Then there’s Orthione griffenis, a parasitic isopod that attacks native blue