Is Naini Lake Haunted By A Predator? Fish Deaths, Foul Stench Alarm Locals

Last Updated:August 01, 2025, 13:00 IST

Naini Lake in Nainital is facing a crisis with dead fish and a deteriorating ecosystem. Locals suspect predatory Mangura fish, and authorities are working to address the issue

The growing number of dead fish and the strong odour have caused significant distress among both locals and tourists. (Local18)

Naini Lake, the iconic body of water in Nainital, Uttarakhand, is currently facing an alarming environmental crisis. The unexpected death of fish and the discovery of their half-eaten bodies have raised serious concerns about the lake’s health. The foul smell in the water and the dead fish floating on the surface indicate a severe deterioration in the lake’s biological condition.

The Suspected Culprit: Mangura Fish

What is particularly disturbing is that some of the dead fish appear to have been half-eaten, pointing to the presence of a predatory fish in the lake. Locals suspect the Mangura fish (also known as catfish), a carnivorous species, could be behind this disturbing phenomenon.

On June 27, a Mangura fish was captured on camera, but authorities have yet to remove it from the lake, allowing the situation to worsen.

A History Of Problems With Mangura Fish

This is not the first time Naini Lake has faced issues with the Mangura fish. In July 2010, a local community introduced the species into the lake, leading to the removal of 39 Mangura fish by the Lake Development Authority.

This history underscores the importance of timely intervention to prevent damage to the lake’s delicate ecosystem.

Alternative Theory: Natural Causes Of Fish Deaths

Some experts suggest that the silver carp and grass carp species, which have been residing in the lake for some time, could be reaching the end of their natural lifespan. While this may explain some of the deaths, the growing number of dead fish and the strong odour have caused significant distress among both locals and tourists.

Efforts To Address The Crisis

Rohitash Sharma, the Municipal Executive Officer, confirmed that efforts to clean the lake are underway, with dead fish being removed as they are discovered. Meanwhile, Vijay Nath Shukla, the District Development Authority Secretary, stated that experts from Pantnagar University’s fisheries department have been contacted, and their report is eagerly awaited.

Urgent Need For Scientific Investigation

Given the seriousness of the situation, experts and authorities agree that a scientific investigation is needed urgently. This will help identify the causes of the biological imbalance and pollution in the lake, so effective steps can be taken to restore the lake’s natural beauty and ecological balance.

Location :

Nainital, India, India

First Published:

August 01, 2025, 13:00 IST

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