Dugong: Where and when to dive with them

Encountering a dugong underwater is a rare and privileged experience requiring patience and respect. Divers should maintain a calm, slow, and non-threatening approach, moving horizontally rather than directly towards the animal. Never chase, touch, or attempt to feed a dugong; doing so can stress the animal, alter its natural behavior, and is often illegal. Keep a respectful distance, ideally at least 15-20 meters, or more if the dugong appears agitated. Pay close attention to their snout and feeding trails in seagrass beds, as these are clear indicators of their presence. They often graze in very shallow water, so listening for the munching sounds can sometimes lead to a sighting. Buoyancy control is paramount to avoid disturbing fragile seagrass beds, which are their food source and home. In some areas, specific regulations and codes of conduct are in place for dugong encounters; always adhere to these local guidelines and listen to your dive guide. Photography should be done with minimal flash and from a distance, prioritizing the animal's welfare over the perfect shot. Remember that dugongs are shy and sensitive creatures, and their conservation depends on responsible and ethical interactions.

Dugong encounters are often best during periods of stable weather and warm water, which generally correlates with peak seagrass health and clarity for diving. In the Red Sea (Egypt and Sudan), the best season typically runs from April to October, avoiding the cooler winter months when visibility can be lower. For regions of Australia, such as Queensland and the Great Barrier Reef, dugongs are present year-round, but the dry season (May to November) often provides calmer seas and better visibility for spotting them in their seagrass habitats. In Southeast Asian locations like the Philippines (e.g., Busuanga, Palawan) and parts of Indonesia, the dry season from November to May is generally optimal. During these periods, seagrass beds are often at their most robust, providing ample food, and the lack of strong currents or storm activity makes interactions more likely and enjoyable for divers. Always check local conditions; heavy rainfall can reduce visibility even during prime seasons.

Dugongs, often called 'sea cows,' inhabit warm, shallow coastal waters across the Indo-Pacific region, ranging from East Africa to Vanuatu, and as far north as the southern Ryukyu Islands of Japan, and south to northern Australia. Their preferred habitats are sheltered bays, mangrove channels, and calm, shallow seas where seagrass beds flourish. These extensive seagrass meadows provide both food and protection. Significant populations can be found in the Great Barrier Reef and Shark Bay in Australia, the Red Sea (particularly around Egypt and Sudan), and parts of Southeast Asia, including the Philippines and Indonesia. While generally non-migratory, some local movements occur in response to food availability, particularly during seasonal changes in seagrass growth or after storm events that impact seagrass health. They are rarely seen in waters deeper than 20 meters, always staying close to the seabed where their food source is abundant.

Dugongs are obligate herbivores, meaning their diet consists almost exclusively of seagrass. They are highly specialized feeders, distinct from manatees who consume a wider variety of aquatic vegetation. Dugongs primarily graze on the tender, nutrient-rich parts of seagrass plants, often uprooting the entire plant, including the rhizomes, with their downturned snouts and bristly upper lips. They use their powerful, muscular snouts to 'plow' through the seabed, leaving distinctive feeding trails in the seagrass beds. This method of feeding helps them access the more nutritious rhizomes buried in the sediment. Their diet may occasionally include some marine algae and invertebrates if seagrass is scarce, but these are not preferred food sources. Their digestive system is highly adapted for processing cellulose, allowing them to extract maximum nutrition from their fibrous diet.