The Maldives can be divided into three atolls: the northern, central and southern atolls, each with their own characteristic Maldivian dive sites.
It's not famous for coral gardens, but diving at the southern atoll - Ari Atoll - means diving at the most reliable dive spot as it concerns viewing big fish such as whale sharks, manta rays, hammerheads, eagle rays, the Napoleon wrasse, grey reef sharks and white tip sharks, and large schools of blacktail barracuda and batfish. Ari Atoll also has several cleaning stations where you can come up close with manta rays. There is a large number of dive sites to choose from, such as Maaya Thila, Five Rocks, Fesdu Wreck, Broken Rock, Fish Head.
One of the northern atolls is Baa Atoll. A must visit dive site in this area is Dhonfanu Thila. This is a submerged pinnacle with a dazzling amount of fish and with mantas and other big fish to be spotted in the blue. At Maavaru Kandu you can find overhangs that offer the most beautiful rainbow coloured corals like whip corals, brick red sponges, black coral bushes and many zoanthids. Between the overhangs there are more sea fans and many hard table corals. At Hanifaru Bay, a large bay on the eastern side of the atoll, mantas visit in large numbers when plankton blooms during the southwest monsoon. Whale sharks also take advantage of these nutrient rich waters.
The central atoll Rasdhoo Atoll is known for diving among larger species. The dive sites around the island are Hammerhead Point and Madivaru Channel. The highlights of Rasdhoo Atoll are dolphins and schools of hammerhead sharks, but there are also reef sharks and large manta rays, grouper, parrotfish, snapper, surgeonfish, and triggerfish.
Another northern atoll is Noonu Atoll. It is an island in the north of the Maldives that has some exciting dive sites like Orimas Thilaat (a drop that leads to a sandy channel at 30m and then to a shark cleaning station) and Christmas Tree Rock (a pinnacle with an interesting shape with swim throughs and coral gardens, depth of 2-15m). The waters at this site can get choppy during the rainy season with currents of over 2 knots. In this area, you can see grey reef sharks and eagle rays, orange basslets, dottybacks, snapper, and trevallies.
And yet another northern atoll worth mentioning is Raa Atoll. At Fenfushi Giri you'll find a number of overhangs with stingrays and napoleon wrasse swimming around and resting on the sandy parts. At the side of the sloping reef there are plenty of hard corals, sea whips and fish life. Expect to see butterflyfish, parrotfish, bannerfish and lots of fusiliers, unicornfish and surgeonfish.
Also, Reethi Thila represents a dive that is typical of the Maldives: a submerged pinnacle with plenty of caverns and overhangs and with a great number of fish. There are many different types of wrasses, angelfish, surgeonfish and triggerfish. At the sandy patches you should look out for mantis shrimp, nudibranchs and even some playful octopus.