Churna Island Marine Protected Area: Geographic Atlas and Coastal Landscape Context

Churna Island has acquired a distinct strand of modern history through its longstanding association with the Pakistan Navy, which has used the island as a firing range and has cited it in naval accounts and books. The surrounding waters have long been worked by fishermen from the nearby village of Mubarak Goth, one of Karachi's larger coastal fishing localities. Beyond these overlapping military and fishing uses, the island gained wider public recognition through recreational diving and confirmed cetacean sightings in 2017, and ultimately through its formal designation as a Marine Protected Area in September 2024.

Above the waterline, Churna is a small, dry, rocky island with a maximum elevation of around ninety meters and no trees or shrubs. Its surface is barren and exposed, shaped by wind, salt spray, and an arid coastal climate, giving it the character of an austere rocky outcrop rather than a vegetated landmass.

Below the waterline, the landscape changes dramatically. Submerged rocky platforms and reef structures form the basis of coral colonies and associated habitat, creating an underwater terrain of cliffs, ledges, caves, and overhangs that divers describe as varied and visually rich. The contrast between the bare, compact island silhouette and the textured reef system beneath the surface is central to the area's identity.

The defining natural feature of Churna Island is the marine ecosystem that surrounds it rather than the landmass itself, which is described as having no trees or shrubs and very limited terrestrial vegetation. The waters support more than fifty coral species across reef formations, with reports suggesting that some coral coverage expanded after the 2004 Indian Ocean tsunami disrupted earlier reef structure and allowed new colonies to establish.

The marine environment is fundamentally reef-based, but it is also shaped by proximity to open Arabian Sea conditions. Pelagic and demersal species mix across the area, and the reef framework provides shelter for invertebrates such as sea urchins, sea fans, and oysters. The result is a relatively compact but ecologically layered marine zone within easy reach of Karachi.

Churna Island's waters host a rich mix of marine life centered on its coral reefs. Reef fish communities include angelfish, barracuda, cobia, mahi-mahi, narrow-barred Spanish mackerel, and skipjack tuna, while rays and the rare green turtle also move through the area. Larger pelagic visitors have been documented as well: a mother blue whale and calf were observed near the island in September 2017, marking the first confirmed sighting of a living blue whale in Pakistani waters, and a killer whale was recorded nearby in November 2017, the first local sighting since 2003.

Churna Island became Pakistan's second Marine Protected Area in September 2024, designated by the Government of Balochistan following Astola Island's earlier recognition. The designation explicitly aims to protect coral diversity, reef-associated fish, and other marine vertebrates around the island, while aligning Pakistan with international commitments such as the Kunming-Montreal Global Biodiversity Framework and its goal of protecting thirty percent of marine areas by 2030.

Despite this protected status, the island faces heavy and ongoing pressure. Industrial facilities such as power plants and oil refineries operate along the broader coastal zone, contributing to marine pollution, while unregulated recreational activities including diving, jet skiing, and boat traffic continue around the reef. Conservation of Churna therefore centers on balancing the island's ecological value with intense human activity on its doorstep.

Churna Island's standout qualities are its reef-rich waters, its accessibility from Karachi for diving and water sports, and its growing profile as a site of confirmed large-whale sightings in Pakistani waters. The 2024 Marine Protected Area designation adds formal conservation weight to an island that is simultaneously a naval training space, a recreational playground, and a working sea for coastal fishing communities.

Equally distinctive is the contrast the island presents between a barren, shrub-free rocky surface and a vibrant submerged reef system. This combination, along with the reef's role as habitat for game fish, makes Churna a focal point for both conservation policy and recreational marine activity along Pakistan's Arabian Sea coast.

The most favorable period to visit Churna Island is from October to March, when cooler temperatures and calmer sea conditions support snorkeling, scuba diving, and boat-based activities. Outside these months, the climate becomes hotter from April onward, and the surrounding waters may be less suitable for surface recreation. Visitors should also be aware that jellyfish are reported in large numbers around the island during October, which can affect swimming and diving comfort.