The Khordha district administration on Tuesday launched a massive eviction drive against illegal shrimp enclosures spread across hundreds of acres in Chilika Lake, targeting unauthorised aquaculture activities in the ecologically sensitive lagoon. The operation is underway in Badakul, Chandraput and Kaliyugeswar areas under the Balugaon police station limits in Chilika tehsil. Officials are working to remove illegal enclosures allegedly created by some fish farmers for shrimp cultivation.