Indus River Dolphin

Fascinating facts about the Indus River Dolphin

• A 28-year-old male Indus river dolphin measured just 199 cm (78 in) long, making it the oldest recorded individual of its species. Most adults are 2–2.2 m (6 ft 7 in–7 ft 3 in) for males and 2.4–2.6 m (7 ft 10 in–8 ft 6 in) for females. That longevity shows the species can survive decades despite heavy human pressures, offering a long window for conservation actions.
• When the Indus dolphin’s range was at its peak it stretched over about 3,400 km (2,100 mi) of river and tributaries, but today it is confined to roughly 690 km (430 mi) – an 80 % loss since 1870. This dramatic contraction illustrates how quickly river habitats can disappear, underscoring the urgency of protecting the remaining corridors.
• Genetic and skull studies reveal that the Indus and Ganges river dolphins split around 550,000 years ago in the Pleistocene, despite decades of taxonomic debate. Their separate evolutionary paths mean each holds distinct genetic heritage, so losing one would erase a half-million-year story of adaptation.
• In 2021 the Sindh Wildlife Department counted about 2,100 Indus dolphins, up from an estimate of 1,800 in 2017, while a 2026 Khyber Pakhtunkhwa survey recorded 135 individuals in a single stretch of river. These fluctuating numbers highlight that localized protection can boost populations, yet they remain fragile and unevenly distributed.
• A dolphin caught in a fishing net on the Chenab River in late September 2026 was rescued on video, marking the first confirmed sighting there since the 1970s. The incident shows that even decades-old gaps in distribution can be bridged, offering hope that hidden pockets may still exist if we look closely.

At a glance

About the Indus River Dolphin

The Indus river dolphin (Platanista minor) glides through the murky waters of Pakistan’s Indus basin with a long, pointed snout that tapers to a thickened tip, a brownish, stocky body, and a tiny triangular hump where a dorsal fin would be. Males reach 2–2.2 m (6 ft 7 in–7 ft 3 in) and females 2.4–2.6 m (7 ft 10 in–8 ft 6 in), while the oldest recorded male measured 199 cm (78 in) at 28 years. Its teeth, visible even when the mouth is closed, start as thin, curved inches-long spears in juveniles and become square, bony disks in adults, hinting at a diet of fish and crustaceans caught by echolocation, a vital sense since the dolphin lacks a crystalline eye lens and is effectively blind. It navigates the shallow, seasonal channels by swimming on its side, a behavior that maximizes maneuverability in the dry-season low-water habitats it calls home. A surprising trait is its ability to detect light intensity and direction despite its blindness, a subtle adaptation that likely aids in orienting within the turbid riverine world. Today the species occupies a fragmented 690 km (430 mi) stretch of the Indus River, a stark reduction from its historic 3,400 km (2,100 mi) range, with isolated remnants in India’s Beas River and Harike Wetland. Five small sub-populations in Pakistan are split by irrigation barrages, and a lone, critically small group persists in the Beas, where only three individuals were estimated in 2024. The dolphin’s side-swimming, echo-based hunting, its unique dental transformation, and its resilience in a river system heavily altered by dams and fisheries paint a portrait of a creature both exquisitely adapted and perilously vulnerable.

Seen on screen

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