Dugongs (Dugong dugon), commonly called “sea cows”, are marine mammals found in shallow coastal waters. They are the only surviving species of the family Dugongidae, with all other relatives now extinct.
Dugongs are herbivorous animals and graze exclusively on seagrass. In doing so, they help keep these underwater seagrass meadows, healthy. This in turn supports several other marine life and enhances carbon sequestration.
In India, dugongs are typically found in Marine Protected Areas, a designated section of the ocean where human activity is restricted. These include Tamil Nadu’s Dugong Conservation Reserve and Gulf of Mannar Marine National Park (MNP); the Rani Jhansi MNP and Mahatma Gandhi MNP in the Andaman and Nicobar Islands; and the Gulf of Kutch MNP, Gujarat. Globally, dugongs roam the coasts of 37 Indo-Pacific countries, from East Africa to Australia.
According to the International Union for Conservation of Nature (IUCN), the dugong is listed as vulnerable due to population declines driven by human activities. The estimated global population is 100,000, though regional numbers vary widely. In India, around 270 are estimated in Tamil Nadu, with limited data for other regions. With this small population, dugongs receive the highest level of legal protection under Schedule I of the Wildlife (Protection) Act, 1972.
Yet, these gentle swimmers face multiple threats to their lives, mainly because the seagrass habitat they depend on to survive is being lost to coastal developments and trawling, pollution, illegal hunting, fishing net entanglement, boat strikes, and heavy metal bioaccumulation. Their long lifespan, going up to 70 years or more, and slow reproduction make population recovery especially difficult.
In an earlier story that Mongabay-India published in 2025, Elrika D’souza, Scientist (Ocean and Coasts) at Nature Conservation Foundation, said, “There is more work that needs to be done to eliminate localised threats in the form of entanglement, overfishing and rare cases of illegal poaching to the dugongs in Indian territorial waters, where the marine mammals cling to their last pockets of precarious existence.”
Read more about the dugong in our stories on heavy metal contamination, community-led conservation, and the need for cross-border conservation efforts.
Banner image: Image by Vardhanjp via Wikimedia Commons (CC BY-SA 4.0).