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

Michel Roggo / Sea lamprey (Petromyzon marinus) Europe

Michel Roggo / Sea lamprey (Petromyzon marinus) close up of disk-shaped mouth with horny teeth, Europe, Captive

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

Nature Production / White tailed sea eagle {Haliaeetus albicilla} pair at nest feeding lamprey to chicks, Shiretoko Peninsula, Hokkaido, Japan, June