looking arty this pic earlier I kinda figured 18.5" so I guess I was close. I would say as skinny as it is probably 2.5 pounds? now if that was a healthy fish your in the neighborhood of 4 pounds give or take. smallies need current or at least access to cooler water and a farm pond isn't likely habitat for them. if he wants to stock fish he'd be better off with crappie, gills, largemouth, channel cats, stuff like that. those fish can take the warmer water better than smallies. 20 pounds of fatheads would be good to try and establish a food source for the remaining fish in the pond, depending on the size of the pond of course. nice catch nonetheless though!