Definitely a common Gambusia Affinis. They somehow get into a pond from any nearby watershed they inhabit, as will green sunfish, given enough time. Gambusia are live bearers like guppies, and can serve as a minor forage fish for small LMB and larger BG, but they commonly stay in VERY shallow water, up in the grass, if available, and have their fry there, so they survive better than fathead minnows (FHM).
