BENGALURU: Tonnes of dead fish have been found floating on the banks of Sheelavanthakere Lake in Whitefield since Sunday. Residents and walkers said it could be due to raw sewage entering the lake from the Nallurahalli side, following rain last week. Officials from the Bruhat Bengaluru Mahanagara Palike, Lakes division, said the mass fish kill is because of depletion of …