# Indus River Dolphin — Facts, Threats & Conservation

*Platanista minor*

> The Indus River dolphin (Platanista minor), or bhulan, is a small, nearly blind freshwater dolphin found only in the Indus River system of Pakistan; it is the national mammal of Pakistan and is classified as Endangered, with fewer than about 2,000 mature individuals remaining.

**IUCN status:** Endangered (IUCN, 2021) — fewer than ~2,000 mature individuals  ·  **WARN range:** Pakistan

## Quick facts
| Fact | Value |
| --- | --- |
| Lifespan | Up to ~30 years (older individuals recorded) |
| Weight | ~70-110 kg |
| Length | Males ~2-2.2 m; females ~2.4-2.6 m |
| Diet | Catfish, carp, prawns and other bottom invertebrates (carnivore) |
| Gestation | ~8-9 months |
| Young per birth | 1 calf (~70 cm at birth) |
| Baby name | Calf |
| Group name | Pod (usually seen alone or in small loose groups) |
| Vision | Functionally blind — no crystalline eye lens; uses echolocation |
| CITES | Appendix I |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Mammalia
- **Order:** Artiodactyla (Cetacea)
- **Family:** Platanistidae
- **Genus:** Platanista
- **Species:** Platanista minor (Owen, 1853)

## Conservation status
- **Status:** Endangered
- **Population:** ~1,987 mature individuals (2017 survey, reported in the 2021 IUCN assessment)
- **Trend:** Decreasing
- **Assessed:** 2021
- **CITES:** Appendix I
- Long listed as a subspecies of the South Asian river dolphin; recognised as a full species (Platanista minor) in 2021. A tiny remnant population persists in the Beas River, India, but the species is overwhelmingly confined to Pakistan's Indus River system.

## Key facts: Indus River Dolphin
- It is the national mammal of Pakistan and survives almost entirely within the Indus River system there, with a tiny remnant in India's Beas River.
- It is functionally blind — it lacks a crystalline eye lens and relies on echolocation to hunt in murky water.
- Adults typically swim on their side, trailing a flipper along the riverbed to detect prey.
- Females are larger than males, reaching about 2.4-2.6 m versus roughly 2-2.2 m for males.
- Irrigation barrages have split the population into isolated subpopulations and divert the water it depends on.
- After near-collapse, conservation work has helped numbers recover from a few hundred to close to 2,000, but the species remains Endangered.

## Why it is endangered
The Indus River dolphin is threatened above all by the engineering of its own river. Since the 19th century, a network of dams and irrigation barrages has been built across the Indus, chopping a once-continuous range of roughly 3,400 km into fragmented stretches and reducing the species' distribution by around 80 percent. These barrages block movement between subpopulations and divert huge volumes of water into canals, where dolphins regularly become stranded as flows drop. Additional pressures include entanglement in fishing nets, water pollution, and historical hunting for meat and oil. The IUCN assessed the species as Endangered in 2021, noting an estimated population of about 1,987 mature individuals and a continuing decline driven by escalating demand for Indus water.

## Behaviour and ecology
This is a dolphin built for a world without light. Living in heavily silt-laden water, it has lost the use of functional eyes — it has no crystalline lens and can likely only sense light direction and intensity — and instead 'sees' through a near-constant stream of echolocation clicks. It commonly swims on one side, sweeping a flipper near the bottom to find prey, then rights itself to breathe. Its diet is made up of bottom-dwelling fish such as catfish and carp along with prawns and other invertebrates. The body is stocky and brownish-grey, with a long tooth-lined beak, a bulging forehead, tiny pinhole eyes, and a low ridge rather than a tall dorsal fin.

## Reproduction and life cycle
Indus River dolphins reproduce slowly, which makes recovery from population crashes difficult. After a gestation of roughly 8-9 months, a female gives birth to a single calf measuring around 70 cm at birth. The calf nurses for up to about a year and stays closely associated with its mother during early life. Animals are thought to live up to around 30 years, with exceptional individuals recorded older. Because reproduction is slow and the population is small and fragmented, even modest losses from canal stranding or net entanglement can have an outsized effect on the species' long-term survival.

## What rescue and protection involve
Protecting the bhulan is as much about water management as about the animals themselves. Front-line conservation centres on rescuing dolphins that become trapped in irrigation canals when barrage gates divert flow, then safely returning them to the main river. It also means patrolling against illegal fishing and harmful net use, monitoring populations through coordinated surveys, securing minimum environmental flows past barrages, and working with riverside communities whose livelihoods are tied to the same water. Because the species lives only in one river system, the health of the Indus dolphin is a direct indicator of the health of the river that millions of people also depend on.

## Indus River dolphin vs Ganges River dolphin
| Feature | Indus River dolphin | Ganges River dolphin |
| --- | --- | --- |
| Scientific name | Platanista minor | Platanista gangetica |
| Local name | Bhulan | Susu / shushuk |
| Main range | Indus River system, Pakistan | Ganges-Brahmaputra-Meghna system, India/Bangladesh/Nepal |
| Vision | Functionally blind (no eye lens) | Functionally blind (no eye lens) |
| IUCN status | Endangered (2021) | Endangered |
| Taxonomy | Recognised as a separate species in 2021 | Recognised as a separate species in 2021 |

## What WARN does
WARN CIC is a registered global not-for-profit animal welfare organisation that raises funds for local partner shelters, sanctuaries and rescue teams in its focus countries — Pakistan, Indonesia, Malaysia, Brazil and Colombia. The Indus River dolphin lives almost entirely within Pakistan, one of WARN's funded countries, which makes it a natural fit for WARN's partner-funded model: channelling donations to in-country teams who carry out canal rescues, anti-poaching patrols and river monitoring. Alongside funding front-line partners, WARN's role is to raise global awareness of this little-known, nearly blind dolphin and the barrage and water-diversion pressures that threaten it.

Every gift to WARN's habitat work helps fund the Pakistan-based partner teams who pull stranded bhulan from irrigation canals and keep the Indus flowing for its last dolphins.

## Frequently asked questions: Indus River Dolphin
### How many Indus River dolphins are left?
The 2021 IUCN assessment estimated about 1,987 mature individuals, based on a 2017 survey of the main subpopulations. The species remains Endangered, though numbers have recovered from a few hundred decades ago to close to 2,000.

### Why is the Indus River dolphin blind?
It lives in extremely silty, murky water where vision is of little use, so over time it lost functional sight. It has no crystalline eye lens and can probably only detect the direction and intensity of light. It navigates and hunts using echolocation instead.

### What do Indus River dolphins eat?
They feed mainly on bottom-dwelling freshwater fish such as catfish and carp, along with prawns and other invertebrates, locating prey by echolocation in water where they cannot see.

### How big are Indus River dolphins?
Females are larger than males, reaching about 2.4-2.6 m, while males are roughly 2-2.2 m. Adults typically weigh on the order of 70-110 kg.

### Are Indus River dolphins dangerous to humans?
No. They are shy, non-aggressive animals that pose no threat to people. The danger runs the other way — dams, water diversion, fishing nets and pollution all threaten the dolphins.

### What is a baby Indus River dolphin called and how is it born?
A baby is called a calf. After a gestation of about 8-9 months a female gives birth to a single calf around 70 cm long, which then nurses for up to about a year.

## Sources
- [IUCN Red List — Platanista minor (Indus River Dolphin), Endangered, assessed 2021](https://www.iucnredlist.org/species/41757/243168232)
- [WWF — Indus River Dolphin species profile](https://www.worldwildlife.org/species/indus-river-dolphin)
- [WWF-Pakistan — Indus River Dolphin programme](https://www.wwfpak.org/our_work_/biodiversity/indus_dolphin/)
- [NOAA Fisheries — Indus River Dolphin](https://www.fisheries.noaa.gov/species/indus-river-dolphin)
- [Braulik et al. (2021), taxonomic revision recognising Platanista minor as a separate species](https://research-portal.st-andrews.ac.uk/en/publications/platanista-minor)
- [CITES — Appendices (Platanista listed in Appendix I)](https://cites.org/eng/app/appendices.php)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/indus-river-dolphin