Illegal prawn gheries spread across 2,000 acres have been removed from Chilika in a joint Odisha enforcement drive. Berhampur (Odisha), Aug 20 (PTI) A new drive has been launched to remove illegal prawn ‘gheries’ to clean the Chilika, the biggest brackish-water lagoon in Asia. Husikesh MohantyBerhampur: Around 2,400 acres of illegal prawn gheries (net enclosure) have been evicted from Chilika during a special drive in and around Balugaon over the past two.