There is something huge, (15-20 lbs easy) and brown creating havok in some lilly pads and I cant tell what it is. Most of the carp I have seen are white in color and do not jump so much. I am new to the lake and am not sure it the lake has carp. Does anyone know?

When the fish rolls or jumps out of the water, it is brown in color, appears to have scales (not catfish like skin) and a dorsal fin like a perch or bass. Any help would be appreciated. I dont want to waste my time fishing for a carp! It actually hit my boat yesterday, I have been after it the last few days.