The sea mink (Neovison macrodon) is a recently extinct species of mink that lived on the eastern coast of North America in the family Mustelidae, the largest family in the order Carnivora. It was most closely related to the American mink (Neovison vison), with debate about whether or not the sea mink should be considered a subspecies of the American mink (making it Neovison vison macrodon) or a species of its own. The main justification for a separate species designation is the size difference between the two minks, but other distinctions have been made, such as its redder fur.