Sea lamprey, also known as vampire fish, experienced a population 'blip' in the Great Lakes due to COVID-19 challenges pesticide teams faced in 2020 and 2021. Here's what to know.
"Sea lamprey control is ongoing," Marc Gaden, deputy executive secretary of the Great Lakes Fishery Commission, wrote in an email to Fox News Digital.
Left: Close up view of an open sea lamprey mouth with teeth with sharp teeth visible. Right: Satellite image of the American Great Lakes – Lake Superior, Lake Michigan, Lake Huron, Lake Erie and Lake Ontario.where sea lamprey larvae live," Gaden continued."Control is achieved through the use of a lampricide — a pesticide discovered in 1957 that is selective to lamprey at the concentrations applied.
Between 2020 and 2021, lampricide applications were reduced significantly as crews responsible for administering the pesticide faced logistical challenges in light of thegenerally results in a"two-year lag time" before lampricide crews know how successful a field season was. "For instance, the survivors of 2020 return to spawn in 2022," Gaden wrote."We did see a spike in numbers in 2022 and we expect to see the same in 2023 ."He continued,"We've been hitting the lamprey hard in 2022 and 2023, so we're hoping the COVID spike was a blip."
While the Great Lakes Fishery Commission has deployed sea lamprey control efforts throughout the Great Lakes, anglers are still spotting the eel-like parasitic fish, which have rows of sharp teeth. They have reportedly been seen attached to other fish, or there's been evidence that the lampreys have taken a bite out of their scaly neighbors.
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