Lake Winnipeg had a recent carp die off. They are investigating, but something similar happened to adjacent Lake Manitoba back in 2008. It may be another break out of koi Herpesvirus disease, which I didn’t know was a real thing until just recently. The virus only infects carp, including koi and goldfish.
I had to bury three giant sized carp that washed up on the lake front. I had never seen carp that size.
Hundreds more washed up on the nearby beach. Dozens of volunteers with rakes and trucks helped clean up the carnage.
I told my daughter that there may have been some repetitive strain injuries.
Tunnel Carp Syndrome.