Fundulus is also the wrong family. Yes that is a very typical member of its species. Here's a hint. The reason that I had to post somebody elses pic of a species I currently keep is that although my fish are almost full grown I have neither the equiptment nor the photographic skill to take a good pic of a fish that small.
Wrong family again! Lets see, we've eliminated Fundulidae, and Nothobranchiidae. I'll also eliminate Cyprinodontidae, Rivulidae, and Profundulidae. Can't make it any easier than that!