I found this little fish in late April in Kincaid Reservoir, Kisatchie NF, just west of the Red River in Central Louisiana. I'm a newcomer to fish ID but seems to me like it has to be a Fundulus, and based on location and lack of a black stripe it seems like the options are Golden Topminnow (F. chrysotus) and the Western Starhead Topminnow (F. blairae). But I can't find any pictures of either that show the large showy blue-ish fins both above and below-- it actually looks more like one of the studfish (like F. catenatus), which don't seem like they should be there-- but I guess could've been introduced. What you think? There's a second individual in the bottom left corner that is presumably the same species.
I've also attached a second photo of another Fundulus at the same site, but that one looks quite different to my eye, and more like one of the expected species.
The site is at the edge of a large reservoir, with some aquatic vegetation, and baby bowfin, baby pickerel, largemouth bass, and sunfish were also present.
Thank you for your help!
Edited by eamoncorbett, 10 June 2019 - 05:19 PM.