i live and fish on the farmington river in ct. lately many rainbows are showing these black sores on them and they barely fight at all. i caught an 18 in bow that i more or less dragged into the net, no fight at all. a call to the dep said that it was cold water disease that they have in one of the stocking tanks. they claim that it does not hurt the fish at all,which i dont believe since all the fish with these sores barely fight,and they do not know if it is contagious.the farmington has many holdover browns and native brookies. has anyone else seen or heard of this?dep says they have never seen it before