Lane got it right.
It’s a blue arctic fox in its summer pelt.
When the blue phase foxes transition from winter to summer pelts, they look like bizarre fairy tail creatures. I was trying to find a photo of a particularly moth-eaten-looking one, but I couldn’t.
The blue phase foxes vary in their color and markings, and I’m going to do a post on them at some point.
I knew a man who bred the blue fox for pets. His foxes were just like petdogs or petcats, very sweet and nice in every sense; he kept them in his house. I considered to buy one, but end up saying “no”. The male fox’s urine is not a nice thing at all.