This issue was brought to Councillor Dasko’s attention last week (Week of April 28th) and he had asked staff to investigate.
Staff in Animal Services reached out to the Ministry of Natural Resources to investigate. MNR has advised that this is a natural occurrence due to the change in the water temperature at this time of the year. Apparently this particular species is susceptible to stress caused by the change in temperature.
To report a fish die-off in Ontario, you can contact the Ministry of Natural Resources and Forestry (MNR) at 1-800-387-7011.