IUCN threat status:

Least Concern (LC)

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Just like their cousin the sea lamprey, European river lampreys live off of the blood of other fish. However, they will also bite off entire pieces of meat from living or dead marine animals. In order to lay eggs, river lampreys migrate upriver. Their larvae remain living in the river bottom for several years. Only when reaching maturity does the river lamprey migrate to sea for a number of years.

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