Looks like a Koi in Comet's pond.

From what I can tell, the firepit in Bigdad's photo looks too close to his garage & trees, and a rather inconsiderate or rude thing to do.
Looks to be sized for a bonfire as well, not exactly brilliant near trees.
And if the neighbor doesn't understand unattended fires, I'd be concerned; that's a bad combination.
Agree that the local Fire Dept may have an opinion and require a change of location.