The Great Lake's Whale Disaster

The Great Lake's Whale Disaster is an event that occured due to people bringing many whale species into the Great Lakes in North America, after SeaWorld and other marine parks during the 1950's to 1990's could no longer afford to keep them any longer (other than the ones that are still present in Sea World parks). All species of whales (both toothed whales and baleen whales) such as the Pacific bottlenose dolphins, Common dolphins, killer whales, Pacific bottlenose dolphins, Commerson's dolphins, Atlantic spotted dolphins, Common dolphins, killer whales, Short-finned pilot whales, Long-finned pilot whales, Beluga whales, Narwhals, Harbour porpoises, Vaquitas, Finless porpoises, Sperm whales, Pygmy sperm whale, Dwarf sperm whales, Gray whales, Common minke whales, Antarctic minke whales, Humpback whales, Fin whales, Blue whales, Right whales, and Pygmy right whales, are causing some negative impact to native species, including the endangered Great Lake Trout, the Columbian Salmon, and the Alligator Sturgeon, by hunting them very frequently. All species of whales also appear to be causing parts of the Great Lakes water levels to rise due to their frequent ramming into some land rocks and soil, along with their ability to produced small amounts of water/pee from their bodies, which would possibly cause the Great Lakes to become a sort of a freshwater ocean (probably about 2 times bigger than the natural Great Lakes), which would cause habitat loss and endanger some other native fish species.

For the similar event, see this: Lake Tahoe Whale Disaster.