Green crabs

Scientists can now identify the presence of species just by testing the water for traces of DNA. The relatively new technique is being compared to the invention of the telescope or the microscope as a significant new tool for understanding ecosystems like Puget Sound. It could be a revolution for tracking the movements of all kinds of species, from salmon and killer whales to invasive green crabs.

The state's stay-at-home order has halted much of the field research that would normally be underway in Puget Sound this spring, but a small group of scientists and volunteers have been able to continue their search for an invading marauder along the shoreline. Their work has been classified as critical by the state.

Genetic testing shows that invasive European green crabs in Puget Sound likely did not come from the Sooke Basin in British Columbia as previously thought. New findings on the crab's origins were presented at the 2018 Salish Sea Ecosystem Conference in Seattle. 

Another European green crab has been spotted in Puget Sound prompting concern that the species may gain a foothold in the region. 

Gaps in regulations could allow invasive species to hitch a ride on ships and boats. We report on some of the potential impacts, and how state and federal agencies are trying to solve the problem. 

Concerns over the potential arrival of the European green crab have inspired a small army of volunteers. A search is underway for early signs of an invasion.