American brook lamprey - Blind and wormlike as ammocoetes or larvae, the american brook lamprey metamorphoses into a brown cylinder, almost 8 inches long.
Miller Lake lamprey - The Miller Lake lamprey is a species of fish in the Petromyzontidae family.
European brook lamprey - Unlike most species of lamprey, the adults do not migrate to sea nor do they have a parasitic phase.
Pacific lamprey - The Pacific lamprey lives along the Pacific Coast of North America and Asia.