The American mink has dark brown fur and a long tail. It has a long, slender body with short, stubby legs and webbed feet. Its ears are tiny and round. The American mink's fur is the reason why it is so often farmed, and it is very soft.
The American mink normally only vocalizes during close encounters with other minks or predators. The sounds it emits include piercing shrieks and hisses when threatened and muffled chuckling sounds when mating. Kits squeak repeatedly when separated from their mothers. During aggressive interactions, the mink asserts its dominance by arching its back, puffing up, and lashing its tail, stamping and scraping the ground with its feet, and opening its mouth in a threat-gape. Should this be unsuccessful, fights may result, with injuries to the head and neck.
Strength of mink are strong enough to hunt a squirrel and rabbit.