Kolkata, June 23 (IANS) El Nino may result in decreased fish catch in the Bay of Bengal and Arabian Sea, the first bulletin on the event released by the Indian National Centre For Ocean Information Services (INCOIS) said on Tuesday.

The INCOIS started releasing specialised El Nino bulletins to highlight the possible impacts of the ongoing system on the maritime sectors.

The first specialised bulletin was released by Konda Vishweshwar Reddy, BJP Member of Parliament from Telangana’s Chevella.

The El Nino event continues to develop and is expected to peak in the winter season (November 2026 to January 2027), the bulletin has confirmed.

As a result, the sea surface temperature in the Indian Ocean will be higher than normal until April/May 2027.

“The marine ecosystem in the northern Indian Ocean (both Arabian Sea and the Bay of Bengal) is likely to be under thermal stress in the coming months, especially during March-May 2027.

This can lead to increased bleaching of coral reefs, more episodes of marine heat waves and reduction in the fish catch (particularly sardine and mackerel species) due to migration of fish stock to suitable habitats or due to decrease in the recruitment,” the bulletin says.

It has also been forecast that the fish may not reach the desired sizes due to changes in the marine environmental conditions related to the developing El Nino.

“The sea state in the Bay of Bengal will remain rough during the monsoon season and there are chances for increased coastal erosion and flooding in the east coast of India,” the bulletin said.

The sea state in the Arabian Sea and west coast is likely to be calmer than usual which can increase the window for operations of various marine sectors.

Coastal erosion and inundation is likely to be less in the west coast during the ongoing monsoon season, it adds.

Maritime operators have been advised by INCOIS to closely follow the alerts, warnings and advisories issued by it from time to time.

The next specialised bulletin will be issued in the second week of July 2026.

–IANS

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