Semiaquatic, inhabiting most aquatic habitats, including some coastal areas.
Minks are carnivorous.
Staple foods include crayfish, frogs, fish, mice, muskrats, and clams. Sometimes cache food. Den in burrows under trees, snags, stumps, logs, and rocks near water. Also use abandoned burrows and lodges of muskrats and other species. Riparian and other wetland vegetation adjacent to rivers, streams, lakes, marshes, ponds, and estuaries.