The Iowa Department of Natural Resources (DNR) recently discovered Eurasian watermilfoil growing throughout the canals near Miller’s Bay and The Harbor canals on West Okoboji Lake in Dickinson County. Brittle naiad was also found in the Triboji lagoon. No Eurasian watermilfoil or brittle naiad was found in the main lake of West Okoboji or the other lakes in the Iowa Great Lakes chain.