Establishment patterns of non-native fishes: Lessons from the Duluth-Superior harbor and lower St. Louis River, an invasion-prone Great Lakes coastal ecosystem

► Non-native (NN) fishes distribution and abundance in the lower St. Louis River. ► Establishment framework to integrate multiple gears and identify status of NN fishes. ► Fishes' status depends on sampling gear, abundance metric, and spatial scale. ► NN fish abundant in channel habitat; native fishes compose 85% abundance system-wide. ► Eurasian ruffe and round goby were both widespread and abundant.