Stay Curious. Stay Connected.
MailNewsletters♡Donate Now
Sign up
*Password must be at least 8 characters and contain one uppercase letter, one lowercase letter, one number and one symbol.
Already have an account?
By submitting, you consent that you are at least 18 years of age and to receive information about MPR's or APMG entities' programs and offerings. The personally identifying information you provide will not be sold, shared, or used for purposes other than to communicate with you about MPR, APMG entities, and its sponsors. You may opt-out at any time clicking the unsubscribe link at the bottom of any email communication. View our Privacy Policy.
Sign in to your profile
Forgot Password?
New to MPR News?
Welcome back
to news
for you
Reset Password

Enter the username on file and we'll send you a code to reset your password.

Still require assistance or not sure what your User Name is?
Welcome back
to news
for you
Email Verification

A verification code has been emailed to

Still awaiting the code?

Photos: Fighting sea lamprey in Lake Superior

Go Deeper.

Create an account or log in to save stories.

Log inCreate a free Account

Like this?

Thanks for liking this story! We have added it to a list of your favorite stories.

Show me!
Tom Davies
United States Fish and Wildlife Service biology technician Tom Davies displays the power of the lamprey's suction Thursday morning along the Brule River in northern Wisconsin.
Derek Montgomery for MPR
Gallery
12 of 12
Corey Goldsworthy, Ryan Bart
Minnesota Department of Natural Resources fisheries biologist Corey Goldsworthy, left, and intern Ryan Bart retrieve a buoy that was in Lake Superior to mark the location of nets dropped to catch lake trout as part of their May survey of the fish to look for signs of lamprey wounds Tuesday, May 22, 2012, on Lake Superior north of Duluth, Minn.
Derek Montgomery for MPR
1 of 12
Tom Davies
United States Fish and Wildlife Service biology technician Tom Davies displays the power of the lamprey's suction Thursday morning along the Brule River in northern Wisconsin.
Derek Montgomery for MPR
2 of 12
Lamprey
Lamprey use their many teeth to latch onto the side of lake trout and suck their body fluids until the trout die. It's estimated that each lamprey kill between 10 and 40 pounds of lake trout during their lifespan, which is estimated at 18 months.
Derek Montgomery for MPR