Marine Animal Encyclopedia
Lampern Lampetra fluviatilis
The lampern is also known as the river lamprey because the adults never stray far from the coast and often remain in estuaries. It may be distinguished from the sea lamprey by its smaller size, uniform color, and the smaller number and different arrangement of its teeth. Larvae that hatch in rivers migrate to estuaries, where they spend a year or so feeding on herring, sprat, and flounder.