Lutra Lutra is the scientific name for the European otter, a semi-aquatic mammal found in rivers, streams, and coastal areas of Europe and Asia. Some of the synonyms for Lutra Lutra include Dreng (Old English), Loutre d'Europe (French), Eurasian otter (English), and Fischotter (German). These synonyms vary based on the language and region, but they all refer to the same animal. The European otter is a charismatic and elusive species that has been threatened by habitat loss, pollution, and overfishing. Conservation efforts have helped to recover populations in some areas, highlighting the importance of protecting these vital ecosystems.