I am fairly certain this is a Gulf Killifish (Fundulus grandis) but I just wanted to drop these here to see what you guys thought. Caught in Archie Creek (Delaney/Archie/North Archie Creek Watershed), Tampa Bay - water was very brackish - also caught Sheepshead and Pinfish.
Looks like one to me, also if u are intampa ay area(which I am pretty sure u are since u gotem from here) i a nice place fore water lettuce, rotal/ludwigia, ghost shrimp, mussels, mosquitofish, and sailfin mollies is the alafis river state park.