Thousands Of Fish Found Dead This Spring In Minnesota

When the ice comes off the lake in the spring, sometimes people will encounter a fish kill. That's when 25 or more fish are found dead after perishing during the winter months. Many reasons can lead to fish kills, but the number one reason is environmental issues caused by humans.

Fish Kills Happen Each Spring In Minnesota

Some fish kills are caused by nature. During the winter months, ice and snow covering the lake reduce sunlight, which can kill vegetation in the lake. Oxygen levels can get so low in the water that the fish die off.

Low water levels can also cause fish kills during the winter months. Diseases, stranded fish, and higher water temperature levels are also causes.

Human environmental issues come from pollution, or even sewage getting into the lake. Runoff chemicals from agriculture can also pollute lakes and streams.

You need to report anytime more than 25 fish are found dead.

The Minnesota Department of Natural Resources asks the public to report fish die-offs if they encounter one. If 25 or more fish are found dead, you need to report it by calling  651-649-5451 or 800‐422‐0798.

The DNR, along with the Minnesota Departments of Agriculture, Health, and Pollution Control agencies, will be contacted. The 4 agencies work together to determine the appropriate response.

Recent fish kills were reported in the Vermilion River in Hennepin County, and 100 or more fish were reported dead in Clear Lake in Sibley County in April.

Read More: Minnesota Counties With The Most Tornadoes

Thousands of fish were found dead in the Mississippi River in April

Back in March, there were over 5,000 dead fish reported in the Mississippi River in St. Paul. They were mostly gizzard shad species. According to the Pioneer Press via Yahoo News, the DNR says it's not uncommon to see this species die off. Minnesota is the northernmost region for this fish, and they aren't suited for the cold water. They usually gather in warmer water areas.

You can find the reports on fish kills in the EQB Monitor, which is published weekly.