The Andaman coast was one of very few places in the world with a viable population but then dead dugongs began washing up. Now half have gone The Andaman coast was one of very few places in the world with a viable population but then dead dugongs began washing up. Now half have gone Tang Khen Bay, where the last remaining patches of seagrass can be seen close to the shore Theerasak ‘Pop’ Saksritawee, an amateur conservationist, uses a drone to monitor the dugongs in the bay Top: biologists