Those green fish are the infamous green sunfish(GSF). Catfish will readily feed on them capturing most of them at night. GSF will learn to eat fish pellets thus when at reasonable numbers they will grow to harvestable sizes (7"-9"). Feeding on pellets expect their growth in TX to be 1yr 2.5"-3.5", 2yr 4"-6.5", 3yr 6"-8.5". Small GSF either alive or dead will be good bait to catch CC.
Adding bottom aeration to the pond will double or even triple the fish growing capacity. Instead of adding coppernoseBG CNBG) or redears(RES) consider adding hybrid BG(HBG). they eat pellets well, easy for kids to catch, grow fast, with minimal reproduction that your numerous CC will control the new small ones. GSF might cross breed with your CNBG, RES, or HBG.
Read about them here.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=256325#Post256325 
