I've consulted with a few of my fishery colleagues and they think it looks like a central mudminnow – a very hardy fish that has the ability to breathe air.
Thank you for the response. That does resemble it. However, none of the ones that I saw had the fin on their backs.
You're welcome. The fin is not always visible but at least 6 fisheries biologists concurred that it is a mud minnow.