Dhigali Haa

A long, narrow coral pinnacle rises from the lagoon floor to a reef top at 7 to 10 metres. Hard corals spread across this shallow shelf, and the first grey reef sharks are usually visible on arrival. Most dives start upstream and let the drift carry you in through schools of fusiliers that condense into silvery curtains as you near the walls.

From the reef top the site splits into two characters. The shallower zone is overhangs draped in soft coral, crevices sheltering morays, and coral gardens where the macro work happens: nudibranchs, octopus, mantis shrimp. This is also where the big groupers hold, with spawning aggregations gathering at the right time of year. Drop deeper and the walls fall into the blue. Canyons cut the lower reef, grey reef sharks work the edges, and eagle rays cruise past in mid-water. Dogtooth tuna and big-eye trevally sweep through in season.

Run the canyons with the current rather than against it. Close the dive back near the reef top, with the fusilier schools hanging behind you through the safety stop.

Baa Atoll's headline belongs to Hanifaru Bay and its manta crowds, but Hanifaru is snorkel-only. Dhigali Haa is the answer to where you actually scuba dive here. It is the atoll's highest-profile tank dive, and its protection status, granted more than a decade before the UNESCO listing, signals reef worth guarding.

The pitch is the combination. Grey reef sharks are the one pelagic you can count on across Baa's thilas, and here they come with vibrant coral, real topographic variety, and the chance of large groupers, which is unusual in an atoll better known for rays. Its position deep in the lagoon keeps it away from the boat clusters on the eastern edge, so divers consistently have the site to themselves.

Current is the thing to plan for. It wraps the thila and can shift from mild to moderate, sometimes stronger, so start upstream, plan your drift, and carry an SMB for the ascent. The interior position gives a little more shelter than the eastern channels, but the flow still brings the pelagics past the reef edge.

Access is by boat from any Baa resort island, from Dharavandhoo local island with its domestic airport, or from a liveaboard anchored in the atoll. A 3mm wetsuit or shorty is plenty in water that holds 26 to 29 degrees. Surface conditions are usually calm, though June to November can turn choppy. The nearest recompression chamber is at Bandos in Malé Atoll, so confirm current emergency arrangements with your operator before diving.