It's been dead a little while, but any guesses as to what it is?

Golden Shiner.

Clean the dirt off of it. Take a close look at how the lateral line dips down.......

Has your pond been overflowing with all this rain? I have been finding a few dried up GSH out in the pasture over last few days, they look just like that.

Yes, this is from the pond not far from you Shorty. There's been a lot of water through the tube and the spillway this spring.