Why you should never release goldfish into lakes or ponds 
By Audra Brown and Dilshad Burman CA Source: citynews 5/11/2020
Audra Brown and Dilshad Burman
The Township of Scugog is reminding residents to never release pet goldfish into lakes or ponds after thousands of them were found in a Port Perry stormwater pond.

While tiny goldfish in a pond might not sound like a cause for alarm, when they’re released in the wild they can turn into a big problem.

“Goldfish are an invasive species and for someone to come in and dump an invasive species like this into the water – it could be catastrophic,” says Brendan Stephens, the concerned citizen who noticed the large number of goldfish in the pond and notified the Ministry of Natural Resources and Forestry (MNRF).

In a post on Facebook, Scugog Lake Stewards Inc. also warned people not to release pet fish into natural water bodies.
 

They say that goldfish remain small and do not multiply when confined to aquariums. But when introduced to a bigger, wild ecosystem, they multiply rapidly, get much bigger and if they were to reach Lake Scugog, could grow to be eight pounds or larger.

In addition, the township cautioned that introducing domestic plants and animals to water bodies can lead to them altering habitats, overtaking resources and spreading disease to native species.

Stephens says if the water in the pond gets high enough to spill over, the goldfish could pose a threat to the ecosystem of a neighbouring stream that is home to trout fry.

 
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