Yea an Otter will take a Mink if the opportunity arises, but he's only king in the water, and so only has an advantage over the mink in open water!
Think about it! A Mink has any amount of nooks and cranny's to pop into, when out of the water! Places an Otter can't get to!
Also, are they really in competition for the same Pray! The way i see it, Otter mainly feed on fish, with the odd bird, rabbit, frog thrown in! Mink mainly pray on frogs, rats, rabbit, with the odd fish thrown in!
Otters hate Mink, that much is true, just like Mink hate Stoats! They see them as competition, and wan