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Arctic lamprey

Fish
The Arctic lamprey, also known as the Japanese river lamprey or Japanese lampern, is a species of lamprey, a jawless fish in the order Petromyzontiformes. It inhabits coastal freshwater habitat types in the Arctic. Some populations are anadromous,... Wikipedia
Scientific name: Lethenteron camtschaticum
Class: Hyperoartia
Family: Petromyzontidae
Conservation status: Least Concern