3/19/2025

MARQUETTE - As ice and snow melt on Michigan lakes this spring, you may see dead fish or other aquatic animals wash up to shore.  The DNR says that while it can be startling to see, it is normal and natural for winter conditions to cause some fish, turtles, and frogs to die. According to the DNR, shallow lakes with soft bottoms and large amounts of vegetation are more prone to winterkill because snow and ice reduce sunlight to underwater plants which reduces the amount of oxygen they produce.  The DNR says the process is completely natural and likely will not have any long-term effects on aquatic ecosystems.  If you see dead fish from winterkill, the DNR asks that you report it on its Eyes in the Field website or by calling your nearest DNR office.