About the Study Guide

You are looking at a preview of what’s in the timed Oregon Boat Ed Course. Feel free to look around, but you’ll need to register to begin progress toward getting your Boater Education Card.

Learn More Register for the Course

Oregon's least wanted: hydrilla, mitten crabs, zebra mussels

Introducing non-native species into Oregon waters can upset the balance of the ecosystem, thereby harming the environment. Aquatic Invasive species, such as zebra mussels, quagga mussels, milfoil, hydrilla, and mitten crabs, most often spread between waterways by hitching a ride on boats and trailers. When transplanted into new waters, these organisms proliferate, displacing native species and damaging the water resource.