Thousands of invasive fish found dead in Langley

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Thousands of invasive fish found dead in Langley

The City of Langley is dealing with thousands of dead invasive fish.

Sarah Atherton with the Langley Environmental Partners Society says crews spent the day cleaning up the Brydon Lagoon- a man-made old sewage settling pond.

She believes the fish kill was caused by an algae bloom last week.

“Some of the European carp in there were a good one to two feet long, so they’ve been in there quite some time. Possibly from people not wanting them in their backyards, ponds or home aquariums, and then releasing them in the lagoon.”

A statement posted on the society’s Facebook page says “suspected low dissolved oxygen is the culprit from an algae bloom that occurred in the lagoon last week. Algae blooms are common at this time of year in closed systems as a result of high nutrient levels (perhaps from lawn fertilizers etc) and increased water/air temperatures. Oxygen levels fluctuate depending upon the growth cycle of the algae.”

The society says the lagoon is not suitable salmon habitat, and many of the fish killed were invasive species such a European Carp, Catfish and Pumpkin Sunfish.

Atherton says luckily no native fish populations were affected.


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  1. If certain species are invasive one would think they are a threat to native species.
    So I’ve always wondered why importation is allowed.
    I’ve seen ads on CraigsList of people wanting things like freshwater snake fish for their aquariums. And as I recall it was a snake fish that ended up in a pond at Central Park in Burnaby just a couple years ago.