Dead fish are washing up along the shoreline at Lake Contrary.
The Missouri Conservation Department said it has received calls about fish kills happening in several lakes and oxbows.
They believe because water levels are low, the fish don't have enough oxygen or room to survive.
Officials said since this fish kill happened so early, the lake could see a larger fish kill later in the summer.
"We wouldn't necessarily expect a bigger fish kill but anything's possible," said Scott Ryan with the Missouri Department of Conservation. "With these degrading carcasses you're adding a lot more nutrients to the water and that may cause much worse algae problem than we usually have and the algae may further suppress oxygen levels and then turn around and kill the fish that are in there remaining."
Conservation officials said fish kills typically happen during the middle of summer when algae levels suck oxygen out of the water causing fish to suffocate.