A male Ganges river dolphin in Assam was tagged and released with the aim to understand their seasonal and migratory patterns.

This is the first tagging of the species in India under Project Dolphin to undertake a comprehensive range-wide research to develop a conservation action plan.

The Ganges river dolphin, the national aquatic animal, is unique in its ecology, being nearly blind and relying on echo location for its biological needs.

Approximately 90 per cent of the species' population resides in India, historically distributed across the Ganga-Brahmaputra-Meghna and Karnaphuli river systems. However, its distribution has drastically declined over the past century.