Releasing pet fish into a lake might sound like a kind thing to do, but in fact, it is quite the opposite. Teller Lake in Boulder, Colorado, is making headlines for a bizarre surge in its goldfish population, after someone apparently dumped three or four of them in its waters a couple of years ago. The lake is now home to a whopping 3,000 to 4,000 goldfish that are putting its delicate ecosystem in danger.
The fish have multiplied beyond control – they’re eating up all the resources, spreading unnatural diseases, and threatening to overrun the lake’s natural species. Colorado wildlife officials say that humans are to blame.
“Dumping your pets into a lake could bring diseases to native animals and plants as well as out-compete them for resources,” said Colorado Parks and Wildlife (CPW) spokesperson Jennifer Churchill. “Everything can be affected. Non-native species can potentially wipe out the fishery as we’ve put it together.”