Why the false gharial is a master of disguise in Southeast Asian waterways

Nature · Published 3 October 2026 Swipe more like this →

In short: Often mistaken for its cousin the true gharial, the false gharial is a formidable, long-snouted predator lurking in the swamps of Southeast Asia. Despite its slender appearance, this elusive reptile is a generalist hunter capable of taking down large mammals, yet it remains one of the world's most endangered crocodilians.

The false gharial, or Tomistoma schlegelii, is a unique freshwater crocodilian found across Peninsular Malaysia, Borneo, Sumatra, and Java. While it shares a superficial resemblance to the true gharial (Gavialis gangeticus) due to its elongated snout, the two are distinct. The false gharial possesses a thicker, more gradually tapering snout and carries between 76 and 84 interlocking teeth, significantly fewer than the 110 found in the true gharial. Furthermore, the male true gharial features a bulbous growth on its snout known as a ghara, a structure entirely absent in the false gharial.

Classified as endangered by the IUCN, the species faces a precarious future with fewer than 2,400 adults estimated to remain in the wild. Their survival is primarily threatened by habitat loss driven by logging and the expansion of oil palm agriculture, alongside the drainage of essential waterways. In Sumatra, these reptiles also face the accidental danger of entanglement in fishing nets, though some local anglers in regions like Sarawak and East Kalimantan intentionally release them, motivated by cultural beliefs that harming the animal invites misfortune.

Despite its narrow, needle-like snout, the false gharial is a versatile ambush predator. While fish make up the bulk of its diet, adults are known to consume amphibians, crustaceans, and mammals as large as pigs and deer. They have even been observed preying on primates like crab-eating macaques. Reproduction occurs during the rainy season between November and March, with females depositing 20 to 60 eggs in mound nests. After an incubation period of 90 to 100 days, the young hatch and must fend for themselves, as the species provides no parental care. Though they may live for 25 years in captivity, they are believed to reach up to 80 years in the wild.

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