Juan Manuel Borrero / Illustration of Sea lamprey (Petromyzon marinus). Pencil and watercolor painting.

Juan Manuel Borrero / Illustration of diagram of ammocoetes or lamprey larvae (Petromyzontiformes) and Myxine hagfish (Myxine sp). Pencil and watercolor painting.

Nature Production / Close up of mouth sucker of Sand lamprey {Lampetra / Lethenteron reissneri} Hokkaido, Japan

Nature Production / Sand Lamprey {Lampetra / Lethenteron reissneri} in a river, Hokkaido, Japan

Norbert Wu / Lamprey (Petromyzon marinus) in parasite phase feeds on fish by rasping through their skin, Salmon River at Lake Champlain, New York