In a typical year, the city's coastline can expect between 100 to 200 adult turtle deaths, said Shravan Krishnan, a volunteer with Chennai-based Students Sea Turtles Conservation Network.

But what happened to these murals? They were painted over. Again and again. "I personally painted over a Banksy. I threw a Banksy stencil away when I was clearing up," Peter said. But he is not ...