The European eel (Anguilla anguilla) is a critically endangered species found in rivers, lakes, and estuaries across the UK. Renowned for its complex life cycle, it spawns in the Sargasso Sea and migrates to European freshwater systems as larvae, where it grows into teh adult stage before returning to the ocean to reproduce. European eel populations have declined sharply due to factors such as habitat loss, overfishing, and barriers to migration, making conservation efforts vital.
