This invasive species makes a huge negative impact on the trout fishery in Lake Erie. The Tillsonburg News published an informative article by, Jeff Helsdon. The article states that,

Lamprey abundance is a roadblock to the present lake trout recovery efforts. Although Lake Erie has a decent population of rainbow trout and other salmonoids, lake trout are the preferred host for lamprey. Lake trout are favoured hosts for two reasons - because the fish reach the large size lamprey like and because of their behaviour.
“Where they are in the water column (depth they live at) makes them particularly vulnerable to lamprey…” Entire Article Here

Take a moment to read the article to learn how fish biologists are tackling the sea lamprey problem.