Jason Krebill, Service employee, collects sea lamprey larvae on the Au Sable River, near Oscoda MI, in late October.

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Photo credit: © NatPar Collection / Alamy / Afripics
License: Licensed
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Keywords: .., fish, forest, historic, invasive, invasivespecies, lamprey, larvae, larvalassessment, midwestregion, national, park, region3, sea, sealamprey, service, slc, species, usa, usfishandwildlifeservice, usfws, wildlife