Weasel's kin are animals that are closely related to the weasel. These include the marten, which is a small carnivorous mammal of the family Mustelidae, the otter, which is a semi-aquatic mammal found in rivers and streams, the stoat, which is a species of weasel found in Eurasia and North America, the SABLE, which is a species of marten found in northern Europe and Asia, the FERRET, which is a domesticated mammal of the Mustelidae family, and the otter, which is a semi-aquatic mammal found in rivers and streams.