Dugong

The IUCN lists the dugong as Vulnerable globally, with a decreasing population trend (assessed by Marsh and Sobtzick in 2019). That single global label hides a harsher reality: regional assessments rate the species Critically Endangered in East Africa and Japan's Nansei Islands and Endangered in New Caledonia, while only a few strongholds — notably northern Australia and the Persian Gulf — remain relatively secure. Across much of Southeast Asia, including Indonesian and Malaysian waters, populations are small, scattered and poorly counted, with only a couple of Asian sites confirmed to hold more than 100 animals. Because dugongs are long-lived and breed slowly, even modest losses each year can push a local population into decline that takes decades to reverse.

Dugongs are entirely marine and rarely stray from the shallow, sheltered coastal waters where seagrass grows. An adult eats tens of kilograms of seagrass a day, uprooting whole plants with its muscular, bristled snout and leaving distinctive feeding trails across the meadow. They are generally slow swimmers, cruising at around 10 km/h, and surface every few minutes to breathe. Mostly solitary or seen in pairs, they sometimes gather in larger herds where seagrass is abundant. Reproduction is unhurried: females give birth to a single calf after a 13–15 month gestation, nurse it for well over a year, and may wait several years between calves.

The two threats that matter most across the dugong's Southeast Asian range are entanglement and habitat loss. Gillnets set in shallow coastal waters drown dugongs as accidental bycatch — in Malaysia's Mersing area alone, numerous deaths, many of them calves and juveniles, were recorded over recent years. At the same time, the seagrass meadows dugongs cannot live without are being degraded by destructive fishing, coastal development, sedimentation from land clearing, and pollution. Seagrass covers only a fraction of the seafloor yet stores a disproportionate share of ocean carbon, so protecting it serves both dugongs and the climate. Vessel strikes, hunting and pollution add further pressure.

Saving dugongs is less about rescuing individuals and more about protecting the meadows they graze and keeping nets out of their path. Effective work combines community-based patrols that deter destructive fishing and reduce gillnet entanglement, seagrass mapping and restoration, response to stranded or orphaned calves, and education so coastal fishers and tourists understand the animal's fragility. Because dugongs range across some 40 countries, lasting protection depends on local teams working meadow by meadow, bay by bay, supported by national protections and international agreements such as the CITES trade ban.