Beneath the murky surface of Hamilton Harbour thousands of giant goldfish are teeming, tearing up vegetation and threatening native species. But now, thanks to a first of its kind study, researchers are have a new weapon in the battle to keep the harbour from becoming a giant goldfish bowl. It's raising alarm because so much effort has been put into Hamilton Harbour. Many of the goldfish in Hamilton Harbour started life as pets or in backyard ponds. "It's raising alarm because so much effort has been put into Hamilton Harbour.

Source: CBC News March 29, 2019 16:30 UTC