Michigan DNR reports winter fish kills in shallower lakes and ponds due to reduced sunlight and oxygen depletion.

Michigan DNR reports fish kill season, caused by reduced sunlight underwater leading to aquatic vegetation dying and consuming oxygen, resulting in fish deaths. Fish kills occur in winter in shallower lakes and ponds as sunlight and ice thickness increase. Although fish that wash up on shore may have died months ago, people should report fish kills through the DNR's Eyes in the Field Reporting System.