i am 2 blocks off the duwamish ( seattles big river ) but i never get haron trying to fish. I think the deep water standing 4 feet off the ground with the strait sides deters them. I have no idea though it is also feet away from 2 walls of my house and slightly overhung. Have seen haron in small preformed pond but my dog was inches away from the last one and i havent seen another yet