Scientific name: Lampetra fluviatilis
The river lamprey is a primitive, jawless fish, with a round, sucker-mouth which it uses to attach to other fish to feed from them. Adults live in the sea and return to freshwater to spawn.
StatsLength: up to 50cm
Weight: up to 150g
Average Lifespan: 4-8 years
Priority Species under the UK Post-2010 Biodiversity Framework.