Ask most people if India has sharks and they picture the coast, maybe Goa or the Andamans. Almost nobody pictures the Ganga. But the river does have a shark living in it, and it might be the most quietly remarkable animal in the whole country.
India's coastline hosts anywhere from around 80 to over 150 shark species, depending on how you count. Of all of them, only two can survive in a river system for any real length of time. One is the bull shark, a saltwater regular that also tolerates freshwater better than almost any other shark on Earth. The other is a true river shark, a species that essentially never leaves. That one is the Ganges shark, Glyphis gangeticus.
A shark built for murky water, not for hunting people
The Ganges shark belongs to a tiny, ancient family of river sharks, one of the rarest groups of sharks in the world. It can grow to around 9 feet, but everything about its body points to a quiet life in cloudy river water rather than a predatory one. Its eyes are small, almost reduced, since there is barely any light to see by in the silt-thick Ganga. Its teeth are slender and narrow, shaped for gripping fish, not for tearing into something as large as a person.
The case of mistaken identity
For decades, river attacks in the Ganga and Hooghly were pinned on this species, and it earned a fearsome folk reputation as a man-eater. The real culprit almost every time was the bull shark, the other river-tolerant species, which is far bulkier, far more aggressive, and armed with broad, triangular teeth actually built for taking down large prey.
In over 150 years of records, there is exactly one attack that might be attributable to a Ganges shark, from 1868, and it was never confirmed as this species.
Rare enough to be almost a ghost
Here is the part that makes this shark genuinely extraordinary: it is disappearing. In 2021, the IUCN classified the Ganges shark Critically Endangered, with fewer than 250 mature individuals believed to survive anywhere [IUCN Red List]. It has been squeezed by decades of gillnet fishing, dam construction cutting up its river habitat, and pollution thickening the water it depends on.
Sightings are so scarce that the species can go a decade or more between confirmed records. In February 2016, a 266 cm (8'7") female turned up already caught, for sale at the Sassoon Docks fish market in Mumbai. It was the first confirmed record of the species anywhere in over a decade, identified by shark scientist Rima Jabado's team from its round snout, tiny eyes, and fin shape [Journal of Fish Biology, 2018].
Why it is worth knowing about
The Ganges shark is not a monster, and it never was one. It is a shy, fish-eating, near-blind river specialist that has been paying for another species' reputation for a hundred years, while quietly sliding toward extinction in the background. If it disappears, it will not be because it was dangerous. It will be because almost nobody knew it was there to begin with.
