DES MOINES, Iowa -- A fish kill in the Des Moines River in Des Moines is caused by a change in water temperatures.
The Iowa Department of Natural Resources says dead and struggling fish were seen along the Des Moines River at Prospect Park, Birdland Marina and the Court Avenue bridge.
An investigation found normal water conditions with no observed contaminants in the water.
The DNR says the specific species of dead fish-- gizzard shad-- are particularly susceptible to sudden changes in water temperature.
They say it's a natural occurrence which happens often at this time of year.
The DNR says those dead fish actually provide food for a number of animals including bald eagles.