You are in Florida… a sad hotbed of byb/puppymill country. Yep agree with the rest, looks basenji to me too. You might contact Pam Hamilton because she'll know if you are in the hoarder area. I'll ask her to check in here.
Ava flattens out exactly like that… and she would love to have a go at my fish, too. I had to put a net over the pond-- not because of the herons, but because of the curly tailed predator. The other day, I caught her chewing through the net, and I know for a fact that she would have NO issue jumping in the water to see what she could catch. Gotta love 'em!