On a sunny day in January, A. Prakash, 40, sits on a boat in Kovalam, off the East Coast Road (ECR) in Chengalpattu district of Tamil Nadu. He has just returned from a fishing trip where he saw 10 Olive…

On a sunny day in January, A. Prakash, 40, sits on a boat in Kovalam, off the East Coast Road (ECR) in Chengalpattu district of Tamil Nadu. He has just returned from a fishing trip where he saw 10 Olive…