Musteline animals are a group of carnivorous mammals that belong to the family Mustelidae. They include the otter (5 letters), which is a semi-aquatic mammal that lives in rivers, lakes and oceans; the ratel (5 letters), which is a small mammal that lives in Africa and Asia; the MINK (4 letters), which is a semi-aquatic mammal found in North America and Europe; and the BADGER (6 letters), which is a burrowing mammal found in North America, Europe and Asia.