The Eurasian otter, lutra lutra, can live for up to 10 years and produce an average of two babies per litter.
From the guardian.co.uk
Since these nocturnal and dawn-active animals are particularly demanding to their habitat, Lutra lutra belongs to the category of very threatened mammal species in Central Europe.
From the sciencedaily.com
More examples
In some classifications considered a genus of the subfamily Lutrinae