Baa Atoll & Hanifaru Bay

A day in Baa runs on a dhoni and a radio. Boats plan two or three dives on the atoll's thilas, and when rangers or another skipper report animals moving into the bay the plan is dropped and the boat repositions: tanks stay racked, everyone goes in with mask and fins, and the visit is short, because numbers in the water are capped and slots are rotated between boats. Afterwards the day picks up where it left off, from a resort, an island guesthouse, or a liveaboard working the atoll over several days.

The diving itself happens on thilas, coral pinnacles that rise off the atoll floor and stop short of the surface, so you descend onto a reef top and work down and around it rather than along a wall. Position decides the dive. Thilas tucked inside the atoll are dived slowly and close in, with the interest under the ledges and in the fish stacked in their shade. Those sitting in a channel take the tidal flow head-on and become a drift, with the reef itself the only shelter to stop and watch from.

Even in the strongest months the bay is not a scheduled event. Plankton has to build before the animals commit, so plan several days in the atoll with the willingness to wait, rather than one booked morning. That is also why the thilas matter: mantas visiting the reefs outside the bay are met on scuba, at a fixed spot, for as long as your gas lasts, and with far fewer people in the water than the bay itself allows.

Who it suits depends on when you come. From May to November divers take greener, plankton-heavy water and some surge as the price of the manta season. From December to April the aggregation disperses, the water settles and clears, and Baa becomes a quieter reef-and-drift destination that rewards photographers working coral, macro and resident reef fish more than anyone counting big animals. Either way it repays a week; a two-night stop is a coin toss.