Somewhere in the deep water about 40 nautical miles southwest of Karachi, a giant of the ocean surfaced, took a breath and slipped back into the blue. The brief encounter, caught on camera, has now become a small piece of scientific history: a sperm whale, estimated at about 45 feet long, has been recorded off the Sindh coast for the first time.
The World Wide Fund for Nature-Pakistan (WWF-Pakistan) announced the sighting on Friday, 6 November. The whale was encountered during a marine expedition led by Zahid Maker, a member of the organisation's board, who filmed the animal as it came up to the surface. The footage captured the features that confirmed the identification: the distinctive blowhole, the unusual skin patterns and the large hump on its back.
What makes the record significant is where it happened. Sperm whales had been seen in Pakistani waters before, but only off the Balochistan coast. The country's first live sighting was reported in September 2017, when fishermen spotted a pair off Gunz, near Jiwani, and before that only skeletal remains had been found, including a skeleton at Sonara Beach near Karachi in December 2005. Until now, the Sindh coast had no confirmed record of the species at all.
Muhammad Moazzam Khan, WWF-Pakistan's technical adviser, said the sighting was the first recorded observation of a sperm whale in Sindh's coastal waters. He described it as an important record for the country's marine science, because it shows that the deep-water habitat off Sindh supports animals that researchers had only ever documented further west.
The sperm whale, Physeter macrocephalus, is the largest of the toothed whales and one of the deepest-diving mammals on Earth. Adults can reach lengths of around 50 feet, and they hunt mainly squid and other cephalopods, diving to depths of 300 to 800 metres, and sometimes far deeper, in search of food. The species is classed as vulnerable, and its presence is taken as a sign of a healthy, productive ocean.
Rab Nawaz, WWF-Pakistan's senior director, said the sighting underlined the ecological importance of Pakistan's offshore waters and the need to protect the marine habitats and food chains that sustain large marine species. Much of the life in those waters, he noted, remains undocumented, and every confirmed record adds to the picture of what is out there.
Pakistan's waters are richer in whales and dolphins than many people realise. WWF-Pakistan has so far documented 26 species of cetaceans in the country's maritime zone, including blue whales, Bryde's whales, Arabian Sea humpback whales and several species of dolphins and toothed whales. The sperm whale now joins that list as a confirmed resident of the Sindh coast as well.
Part of that knowledge comes from fishermen themselves. WWF-Pakistan has trained more than 100 fishermen, mostly boat skippers, to record sightings of whales, dolphins and other large marine animals they meet at sea. Those reports, combined with dedicated expeditions like the one that found this whale, have steadily built up the record of what swims off Pakistan's shores.
For marine researchers, the next question is whether this was a lone animal passing through or part of a regular presence that has simply gone unnoticed. Sperm whales roam enormous distances across the world's oceans, and a single sighting cannot answer that on its own. What it can do is give survey teams a reason to look harder in the same waters, and to keep the reporting network of fishermen and researchers active.
The whale itself is long gone, of course. It surfaced, breathed and disappeared, as sperm whales do, leaving behind a few minutes of video and a first for Sindh's coast. For the researchers who recorded it, that was enough: a reminder that even in waters fished and sailed every day, the sea can still produce a surprise.
