I went to feed my fish this AM and found about 7 dead bluegill floating on the surface. We had about 1 1/8" of much needed rain yesterday and it has debris floating on the surface. My catfish and several bluegills fed this morning. What might have killed these fish? Also they appear to be as small or slightly smaller (2 to 3 inches long) than the fish I originally stocked 4 months ago. Would these fish be this size already if they were produced from a spawn? Don't like seeing floating fish.

Bill