Off the southern tip of Laamu, Hithadhoo Corner is a cleaning station of about five small pinnacles where reef mantas (Mobula alfredi) gather in every month of the year, unlike most Maldivian manta sites. The encounter is strong but not certain. Divers put the chance of a sighting at about 50:50 on any one dive, and the water can be thick with plankton and surge.
The rest of the diving is built on current. Few channels break the outer reef, so the tide moving in and out of the central lagoon is squeezed through them and can run hard. Fushi Kandu is the atoll's top channel dive, with whitetip reef sharks, barracuda, schools of jacks and tuna, eagle rays and Napoleon wrasse. Advanced divers find more drift diving in the northern channels. Maabaidhoo Kandu is another channel dive, near Maabaidhoo island.
Inside the lagoon the diving is milder. Isdhoo, off the northern island of that name, and Gaardhoo Faru, a reef ring in the south, are the easy days, with coral gardens and turtles; seagrass meadows near the resort add sleeping rays and more turtles. Whale sharks are sometimes seen west of the atoll, though centres do not promise them.
On 21 December 2021 the government designated six Laamu sites as protected areas under the Environment Protection and Preservation Act, covering wetlands, reefs, lagoons, mangroves, seagrass meadows and beaches. It is an environmental designation and brings no diving restriction. The same year Mission Blue named Laamu a Hope Spot, an NGO label with no legal force. A proposed no-take zone at Hithadhoo Baaneykolhu, aimed at fishing pressure, was still awaiting government approval and cannot be counted as in force. The reefs have also taken damage: the 2024 bleaching event left 38.36 percent of hard coral cover bleached, worst in the shallows and among Acropora, so shallow reef tops are where it shows.