Thread: What kind of fish

I was trolling crank baits on ky lake yesterday not not having any luck .. I was on the main river ledge... after awhile I deceided to cross the river to the other side of the channel when I was about mid river 50 ft deep my humming bird 898 lit up over a large area with fish arches Big arches 1/2 to 3/4 inch long on the 898 screen most of the fish where hovering in the 30 to 45 foot depth.. I am curious WHAT SPEICES OF FISH DO YOU THINK I COULD HAVE BEEN MARKING ? I trolled thru them but my crank baits were only running about 15 ft deep and never caught anything