We live on a big lake that flows into the Columbia. Someone got the bright idea to add a freshwater shrimp to the ecosystem so the tourists would catch bigger fish. Kokanee -- a landlocked salmon -- and rainbow or lake trout. The shrimp biomass replaced the kokanee biomass and now the shrimp have to be harvested but the kokanee population has increased its numbers. Human meddling and unforeseen consequences. Now we're blanching at the thought of invasive mussels arriving on tourist speedboats.
