The waters around Dhigurah and throughout South Ari Atoll are among the richest in the Maldives for marine life. The atoll's position, its reef structure, and the presence of a marine protected area combine to support an extraordinary range of species, from the largest fish on earth to the smallest reef inhabitants.
Whale Sharks Year-Round
Dhigurah's claim to marine fame is its proximity to the South Ari whale shark zone, where juvenile whale sharks can be found feeding near the surface throughout the entire year. This year-round presence is unusual globally; most whale shark aggregation sites are seasonal, but the nutrient-rich waters along the western edge of South Ari Atoll sustain a resident population that does not appear to migrate away. The sharks are mostly juveniles, typically four to eight metres in length, though larger individuals are occasionally seen. They feed on plankton and small organisms near the surface, moving slowly enough for snorkellers to keep pace. The consistency of sightings means that visitors to Dhigurah at any time of year have a strong chance of a whale shark encounter, though the November to May dry season offers the best conditions with calmer seas and better visibility.
Manta Rays
Reef manta rays visit South Ari Atoll seasonally, attracted to cleaning stations on specific reef formations where small fish remove parasites from their bodies. These cleaning stations are well known to local dive operators, and trips are timed to coincide with the seasons when mantas are most reliably present. The southwest monsoon from May to October tends to bring mantas to the eastern side of the atoll, while the northeast monsoon from November to April draws them to the western side. Manta rays have wingspans of up to three metres and move with an effortless grace that makes every encounter mesmerising. They often circle the cleaning station repeatedly, giving divers and snorkellers extended viewing opportunities.
Reef Sharks
Multiple species of reef shark inhabit the waters around Dhigurah. Grey reef sharks are the most frequently seen, patrolling the reef edges and channel entrances in small groups. Whitetip reef sharks rest under overhangs during the day and become active hunters at night, and they are commonly encountered on both day and night dives. Blacktip reef sharks occasionally cruise the shallows near the beach, particularly at dawn and dusk. These sharks are all part of a healthy reef ecosystem and pose no threat to swimmers or snorkellers.
Nurse Sharks
Tawny nurse sharks are a common and endearing presence around Dhigurah. These bottom-dwelling sharks spend much of the day resting on sandy patches beneath coral overhangs, and snorkellers frequently spot them on the house reef. They are docile and slow-moving, and while they should not be touched or harassed, they are comfortable in the presence of humans and will often remain stationary as you float above them. At night, nurse sharks become more active, hunting for crustaceans and small fish on the reef.
Turtles and Reef Life
Green turtles and hawksbill turtles are resident on Dhigurah's house reef, and encounters while snorkeling are common. The reef supports healthy populations of butterflyfish, angelfish, parrotfish, wrasse, triggerfish, surgeonfish, and moray eels. Eagle rays glide over sandy patches, stingrays lie camouflaged on the bottom, and octopuses can be spotted changing colour as they move across the reef. The house reef alone provides hours of rewarding snorkeling, and the boat-accessible dive sites of the wider atoll add even more diversity to the marine experience.