Green turtles fight to survive against Pakistan's urban sprawl

Against the backdrop of the mega port city of Karachi in Pakistan, four green turtles emerge from the frothy Arabian Sea seeking a spot to lay their eggs.

One trundles towards the end of the beach bank, its flippers whipping sand into the air before settling on a dry spot of sand in which to deposit 88 golf ball-sized eggs.

Until the early 2000s, the beaches of Pakistan's Arabian coast were the nesting habitat for five endangered turtle species.

Now only the green turtles come to shore to lay their eggs on just two beaches in Karachi and on uninhabited islands in Balochistan province, further down the coast towards Iran.