Whale
The IWC has designated two whale sanctuaries: the Southern Ocean Whale Sanctuary, and the Indian Ocean Whale Sanctuary. The Southern Ocean whale sanctuary spans and envelopes Antarctica. The Indian Ocean whale sanctuary takes up all of the Indian Ocean south of 55°S. The IWC is a voluntary organization, with no treaty. Any nation may leave as they wish; the IWC cannot enforce any law it makes.
Churna Island
On 14 September 2017, a mother blue whale was spotted near the island along with her cub. The mother was 17 meters in length. This was a first sighting of a living blue whale in the Pakistani sea, as previous blue whales were just beached skeleton of the dead whales with last specimen was observed at Khuddi Creek along the coast of Sindh in August 2014. There have been 47 sightings of Baleen whales in this area but none of them was blue whale.
On 22 November 2017, a killer whale was spotted near the island, it is a rare sighting as killer whales are found in deep water where as thedepth of the water where the whale was sighted was only 72 meters deep. It was also first sighting of killer whale in Karachi as no killer whale was reported in this area since 2003.
Other marine life around Charna includes yellow-bellied sea snake, great barracuda, narrow-barred Spanish mackerel, cobia, mahi-mahi, skipjack tuna, angel fish, sea urchin, sea fan, oyster, ray fish and rare green turtle. Pakistan Game Fishing Association (PGFA) holds national angling competitions near Charna. It is the presence of coral reefs around this island that attracts the number of big game fish around it. However, illegal net sizes used by fishing trawlers are destroying this natural treasure.