In North Carolina, Lake Norman has experienced an increase in spotted bass populations. According to the N.C. Wildlife Resources Commission, introductions of spotted bass into the 32,475 acre reservoir may have been undertaken by well-intentioned anglers who want to "improve the bass fishery." Fishery managers discourage such measures, noting that introductions of non-native fish into waters where they are not found can have unintended effects.
According to biologists, spotted bass often compete with other black basses and alter their genetics when they interbreed. In some areas, spotted bass can replace a largemouth bass fishery. Kin Hodges, a biologist with the Commission’s Division of Inland Fisheries, warned against private introductions of fish into state waters, saying:
"... we run the risk of seeing diminished black bass fisheries in the future unless anglers quit moving spotted bass into new lakes where they frequently have negative impacts on the existing populations of largemouth or smallmouth bass."
According to the N.C. Wildlife Resources Commission, the stocking of fish in public waters of North Carolina without a valid stocking permit is illegal.
source: N.C. Wildlife Resources Commission