As is the case with many lakes in Quebec, the aquatic invasive species Eurasian Milfoil is present and widespread in Blue Sea Lake. This troublesome plant reproduces by fragmentation and can easily be spread by boaters travelling through milfoil beds and whose motors cut up and drag milfoil stems from one area to another.

To deter boaters from disturbing and further proliferating beds of Eurasian milfoil now present throughout Blue Sea Lake, a program of demarcation buoys has been established. Yellow buoys are deployed in the spring, repositioned during the summer, and retrieved and stored in the fall. 

If you like being on the water and would like to volunteer your time to help with this activity, please visit the Volunteer section of the website.