rare-predatory-fish-in-assam-river-sparks-concerns-over-native-species

The discovery of a rare crocodile catfish (Bagarius suchus) in Guwahati’s Bahini River has sparked concerns among environmentalists and fisheries officials over its potential impact on the region’s aquatic biodiversity.

The fish, native to Southeast Asia, is known for its predatory nature and could threaten local species.

A fisherman in the Basistha area of the city caught the specimen on Monday, prompting immediate attention from the Assam Fishery Department.

 

Identified as a crocodile catfish, the species is usually found in the Mekong and Chao Phraya river basins of Laos, Cambodia, and Thailand.

 

This marks an unusual and possibly alarming intrusion into Assam’s waterways.

Experts have warned that the presence of this non-native species could disturb the natural balance of the local ecosystem.

The crocodile catfish, which can grow up to 70 cm (28 inches) in length, preys on smaller fish, larvae, and crustaceans, posing a serious threat to indigenous aquatic life.

According to fisheries officials, if the species establishes itself in Assam’s rivers, it may lead to a decline in native fish populations.

The Assam Fishery Department has collected samples for further analysis to determine the extent of the ecological impact and assess whether the fish has begun reproducing in local waters.

 

Authorities are also investigating how the species arrived in the river, with speculation that it may have entered Assam from Bangladesh.

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A fishery department official stated, “Bangladesh recently imported the fish. So it might have come from Bangladesh.”

However, the exact mode of its arrival remains uncertain, raising concerns about unregulated aquatic species trade and the risks of invasive species proliferation.

The crocodile catfish is classified as 'Near Threatened' by the International Union for Conservation of Nature (IUCN).

It thrives in cool, fast-flowing waters with a temperature range of 18-23°C and a pH of 6.0-7.2. Given its ability to adapt, experts fear that if left unchecked, it could permanently alter the ecological structure of Assam’s rivers.

 

Authorities have urged local fishermen and environmental agencies to report any further sightings of the species to prevent its spread.

 

The Fishery Department is expected to release a detailed report after concluding its investigation into the presence of this predatory fish in Assam’s waters.