A study has found that several shrimp farms in Thangalperumbalam, a revenue village located within the eco-sensitive zone of the Pulicat Bird Sanctuary in Tiruvallur district, have been set up in violation of coastal regulation rules.

The study, conducted by researchers from the Save Ennore Creek campaign, found that at least 309 acres (roughly equivalent to 34 cricket stadiums) in the village have been occupied by shrimp aquaculture farms. Of these, farms in 173 acres were set up in violation of environmental buffer norms that govern such activities within eco-sensitive regions.