Otter – Wikipedia

Otters are carnivorous mammals in the subfamily Lutrinae.The 13 extant otter species are all semiaquatic, aquatic or marine, with diets based on fish and invertebrates.Lutrinae is a branch of the weasel family Mustelidae, which also includes badgers, honey badgers, martens, minks, polecats, and wolverines

: https://en.wikipedia.org/wiki/Otter