More than a dozen decrepit dogs splash into the Arabian Sea as the small wooden boat approaches. They know the fishermen's mission: bringing food and water for the canine population of one of Karachi's "dog islands". The islands, despite their lack of food and fresh water, have become a sanctuary. But their survival depends almost entirely on the supplies brought to them by Karachi's fishermen. It is not known for sure who first brought dogs to the islands, but fishermen believe they were transported by villagers along the coastal areas.