There are efforts to reduce invasive fish populations on Twin Cities lakes by a process called "electro-shock." "We were catching them by the buckets. Five-gallon buckets. We couldn't even count them there were so many," said Jordan Wein of WSB. Last year, it was open season on goldfish at lakes in Chaska and Robbinsdale. The former pets had been released into the water, where they multiplied and squeezed out native fish. This summer WSB is going after another invasive species -- carp. The engineering company is trolling across Normandale Lake in Bloomington, using their electro-fishing boat to stun the fish...