Invasive fish and invertebrates pose a significant threat to all waterbodies, from small streams to large lakes to oceans. Invasive fish and invertebrates can outcompete native species, alter ecosystem function, and reduce critical habitat. These changes can have cascading effects on biodiversity, the fishing industry, recreational activities, property values, and more. Human activity, including recreational boating and fishing, is a primary mechanism of spread for invasive fish and invertebrates.