There have been reports of a dead whale shark being landed at Karachi harbour a few days back. Interestingly, some reports claim that the fish was not "dead" but "unconscious" when sighted out at sea. I am not sure whether foul play can be ruled out here.
Whale sharks, the largest species of fish on the planet, are listed as vulnerable by the IUCN, and fishing them is outlawed in several countries including India.

Sharing one report here...
Source: Pakistan: 40-foot dead whale shark turns up in Karachi | Asian Correspondent

Hundreds of people gathered at a fish harbor in Pakistan’s city Karachi on Tuesday to see a 40-feet long dead fish, a sight uncommon in the country during the past many years.

The giant whale shark washed ashore on Tuesday but according to media reports it was spotted unconscious 10 days ago some 150 kilometers away from the fishery.

The dead whale shark was lifted off the water with the help of more than two cranes, after earlier attempts had failed.

In July 2010 a 17-foot whale shark was found on the shores of Hawksbay in Karachi, but Tuesday’s fish was certainly more than double in size and weight.

Later in the evening the Express Tribune newspaper reported that dead shark was sold at Rs 1.7 million (around $18,888). The report also reads: “Two cranes were called in to fish the dead whale shark out of the water, which was approximately40 to 50-feet long and six-feet wide. Both cranes failed to pull out the fish and were sent back as at least three more cranes were required to carry out the task.”