The Tawny Nurse Shark
The tawny nurse shark (Nebrius ferrugineus) is one of the most commonly encountered large marine animals in the Maldives and arguably the most approachable shark species in the archipelago. With its broad, flat head, small eyes, prominent barbels (sensory whiskers near the mouth), and sluggish daytime demeanour, the nurse shark looks and behaves nothing like the streamlined predators most people picture when they think of sharks.
Adults can grow to impressive sizes — up to 3.2 metres in length — making them one of the larger sharks you are likely to see on a Maldivian reef. Their bodies are a uniform tawny brown or sandy colour, sometimes with faint spots in juveniles, and their skin has a rough, almost velvety texture. The tail fin is unusually long, sometimes accounting for nearly a quarter of the total body length, and lacks the pronounced upper lobe seen in more active shark species.
Despite their size, nurse sharks are docile, slow-moving, and overwhelmingly harmless to humans. They are bottom-dwellers that spend most of the day resting in caves, under overhangs, or on sandy patches of the reef floor, often piled on top of one another in communal resting sites. This sedentary behaviour makes them one of the easiest sharks to observe at close range — a fact that has made them a star attraction at several locations in the Maldives.
The Famous Fulidhoo Harbour Nurse Sharks
Perhaps the most famous nurse shark gathering in the Maldives occurs at Fulidhoo, a small local island in Vaavu Atoll. Here, dozens of nurse sharks congregate in the shallow harbour area, attracted by fish scraps discarded by local fishermen. The sight of 20 or more large sharks gliding through knee-deep water next to the harbour wall has become one of the most iconic wildlife experiences in the Maldives and a major draw for visitors to this otherwise quiet island.
The Fulidhoo nurse sharks are habituated to human presence and will swim calmly past waders and snorkellers. Visitors can enter the water at the harbour and observe the sharks from just a few metres away — an experience that is simultaneously thrilling and reassuring, as the sharks show no interest whatsoever in the humans around them. Local guesthouses organise nurse shark viewing as a key activity, and the spectacle is best in the late afternoon when fishermen return with their catch.
Other local islands also host nurse shark gatherings near their harbours and fish-cleaning areas, though none are quite as famous as Fulidhoo. Alimatha in Vaavu Atoll is another well-known site, where nurse sharks and stingrays gather at a reef platform near the island, particularly after dark when resort staff formerly provided fish scraps.
Behaviour and Biology
Nurse sharks are nocturnal hunters. While they appear lethargic during the day — often lying motionless on the bottom for hours — they become active after sunset, prowling the reef in search of prey. Their diet consists primarily of octopus, squid, crabs, sea urchins, small fish, and reef invertebrates. They locate prey using their barbels, which are covered in taste and touch receptors, and their small mouth is adapted for powerful suction feeding — they can generate enough negative pressure to extract a conch from its shell or pull an octopus from a crevice.
Unlike many shark species, nurse sharks do not need to swim constantly to breathe. They can pump water over their gills while lying still, which is why they are able to spend entire days resting on the bottom. This adaptation also allows them to wedge themselves into tight caves and overhangs where water flow would be insufficient for obligate ram-ventilating sharks.
Nurse sharks are ovoviviparous — the eggs develop and hatch inside the mother's body, and she gives birth to live pups. Litters are small, typically four to eight pups, each around 40 to 60 centimetres at birth. The pups are independent from birth and seek shelter in shallow reef areas where predators are fewer. Growth is slow, and nurse sharks may take 15 to 20 years to reach maturity, with a lifespan estimated at 25 years or more.
Where to See Nurse Sharks
Nurse sharks are found across all atolls of the Maldives, from the far north to the deep south. They inhabit a range of reef habitats, from shallow lagoons to reef slopes at 30 metres or more. The most reliable daytime sightings are at known resting sites — caves, overhangs, and sheltered channels where groups of nurse sharks congregate.
Many resort house reefs have resident nurse sharks that divers and snorkellers can observe regularly. Dive guides at popular sites throughout Ari Atoll, South Male Atoll, and Vaavu Atoll know the specific caves and overhangs where nurse sharks rest and will include these in their dive plans. Channel dives are also productive, as nurse sharks often rest on the sandy floor of kandu (channels) between islands.
For the closest encounters without diving, the harbour gatherings at Fulidhoo and similar local islands are hard to beat. Night snorkelling on reef flats also offers the chance to see nurse sharks actively hunting — a very different spectacle from the sleepy daytime animals.
Are Nurse Sharks Dangerous?
Nurse sharks are considered harmless to humans, and unprovoked attacks are essentially unheard of. They have small mouths relative to their body size, and their teeth are designed for crushing shellfish rather than biting large prey. They are not territorial and show no defensive aggression toward swimmers or divers.
The only risk comes from deliberate provocation. Nurse sharks have been known to bite when grabbed by the tail, stepped on, or otherwise harassed — a response that any animal would share. Their jaw strength is considerable, and a defensive bite, while not life-threatening, can be painful and require medical attention. The simple rule is: look but do not touch. Give them space, and they will give you an unforgettable, completely safe wildlife encounter.
It is also worth noting that the Maldives' shark sanctuary regulations protect nurse sharks along with all other shark species. It is illegal to catch, harm, or deliberately harass sharks in Maldivian waters. These protections are one reason why the Maldives continues to offer some of the best shark encounters in the world.
Nurse Sharks and the Ecosystem
As predators of invertebrates and small reef organisms, nurse sharks help maintain the balance of the reef ecosystem. By controlling populations of sea urchins, which can overgraze algae and erode coral, and by preying on crabs and octopuses, they contribute to the health and stability of the reef community.
Nurse sharks also play a role in nutrient cycling. They feed across wide areas of the reef at night and rest in concentrated groups during the day, effectively transporting nutrients from dispersed feeding grounds to localised resting sites. The waste they produce at these sites enriches the surrounding water and substrate, supporting the growth of corals and other sessile organisms.
For the broader shark community of the Maldives, nurse sharks serve as an accessible ambassador species. Many visitors who are initially nervous about sharks have their first close encounter with a docile nurse shark and leave with a transformed understanding of these animals — an attitude change that supports conservation efforts well beyond the Maldives.