Speed is of vital importance in these investigations. Since fish decompose rapidly, especially in warm weather, evidence may be lost within hours. It is important, therefore, to report any fish kills immediately. In river systems, toxins and fish carcasses may travel downstream from where the kill occurred. If you see evidence of a fish kill, contact the nearest office of the Ministry of Environment and Energy or the Ministry of Natural Resources right away.
Many people release unwanted aquarium pets into natural waters.
Not only is this activity illegal, it can harm the environment. Several exotic species of plants and animals have been introduced to the Great Lakes region by this practice. If you have an unwanted aquarium pet, return it to a local pet store, or donate to a school or other institution - it will be better for your pet and the environment. Many new populations of bass and other fish species have been established in Ontario through unauthorized stocking. These introductions are often conducted by individuals with good intentions of creating new recreational fisheries.