Hmmm, https://en.wikipedia.org/wiki/Redtoothed_triggerfish Seems just the same photo…

That’s delightfully sinister, isn’t it?

I like the tidiness of the feathers on its back - the Grey Herons round here (Reading, UK) tend to scruffiness!

I’m jealous you got a picture of a fox at all, never mind a clear one: I’m sure they are around here (I hear them in the summer “barking”) but I’ve no photos and not seen all year.

However, you might want to try a little post-processing in whatever software you’ve got - it might be called a luminance histogram, tone curve or something like that, but it should address the rather washed out appearance without just darkening the entire shot. If you’ve a RAW format of the photo, work on that, but even a JPG might be improved.