What is meant by "coarse" fish?
Here in the uk and ireland our native freshwater fish that aren't game fish are referred to as 'coarse' fish. Perch, pike, roach, chub, tench, bream, rudd, barbel and carp are typically the main ones. They all survive very well in the coldest winter temps. Thats why the introduction of non native fish isn't much of a concern for us. I'd like to see a snakehead for example thrive in our waters. If they could our fish populations would be decimated, and then we'd have the powers that be banning everything that swims, just like in the states.