Diving in Alifu Alifu Atoll

North Ari is the thila-and-channel half of greater Ari Atoll, and it dives big. Submerged pinnacles rise out of a vast lagoon, tidal channels funnel current and pelagics, and the signature dives are hook-in shark encounters rather than gentle coral pottering. Maaya Thila is the one most divers name first: a compact protected pinnacle famous for its whitetip-reef-shark night dive, when resting sharks switch to coordinated hunting under the torches. Fish Head, an oval protected thila fronting a major channel, is the classic grey-reef-shark hook-in. The atoll has a softer side too. The Fesdu Lagoon manta night dive puts barrel-rolling mantas under boat lights in shallow water, the Moofushi cleaning station offers an all-levels manta encounter on a shallow plateau, and the Fesdu Wreck pairs an overgrown trawler with a coral pinnacle on one profile. Mantas work the atoll on a monsoon cycle, and reef sharks, eagle rays, Napoleon wrasse, and barracuda are the regular cast.

Current is the variable that shapes every choice here. It runs strong and changeable on the thilas and in the channels, so operators read the tide and pick sites to match, and house reefs and the lagoon are the calm-water fallback. The dry northeast monsoon, December to April, gives the calmest seas and the best visibility, commonly 20 to 30 metres, plus reliable shark and cleaning-station action. The wet season trades clarity for plankton-rich manta feeding and fewer divers. Most marquee dives run to around 30 metres with current, so they reward Advanced Open Water and good buoyancy. Newer divers should steer toward the Moofushi station on a calm day, the Fesdu pinnacle, and resort house reefs. You can dive North Ari from a resort, a local-island guesthouse, or a liveaboard. The compact layout means most operators can reach the marquee sites, but confirm the longer trips before booking. Adjacent Rasdhoo, with its dawn hammerhead dive at Madivaru Corner, sits on the same itineraries if you want to add it.

Northern half of Ari Atoll: a rim-and-lagoon system studded with thilas (flat-topped pinnacles dropping past 30 m), kandus (tidal channels), sloping reefs, drop-offs, and a few sunk wrecks.