Manta rays in the Maldives: where, when and how to swim

The Maldives has the largest known population of reef manta rays in the world. The Manta Trust, through its long-running Maldivian Manta Ray Project, has identified more than 5,500 individual reef mantas from over 80,000 photo sightings (figures from its 2023 report). The same programme has also recorded more than 900 oceanic mantas, a bigger and shyer species that visitors see far less often.

The reason is the shape of the country. Its rings of reef sit in the open Indian Ocean, and monsoon currents push plankton against them. The Manta Trust describes the atolls as working like funnels and traps for food. Where the plankton collects, the mantas follow.

All rays, including mantas, have been protected by Maldivian law since 2014. Catching, harming or harassing them is an offence.

• Size: most reef mantas you see are around 3 to 3.5 metres from wingtip to wingtip. Very large ones grow bigger.
• Diet: zooplankton, the tiny animals drifting in the water. Mantas have no sting and are harmless to swimmers.
• Status: listed as Vulnerable worldwide by the IUCN. They breed very slowly, which is why local protection matters so much.
• Looks: black on top, white underneath, with a pattern of dark spots on the belly.

Every manta has its own belly spots

The spots on a manta’s underside are unique and stay the same for life, a bit like a fingerprint. That is how researchers tell one animal from another without tagging it. If you get a clear photo of a manta’s belly, you can send it to the Manta Trust’s “IDtheManta” project. Many visitors learn their manta already has a name and a long sighting history.

You will usually meet mantas in one of two situations. They behave quite differently in each.

Cleaning stations

A cleaning station is a coral head or reef patch where small fish, such as cleaner wrasse, pick parasites and dead skin off larger animals. Mantas visit to be cleaned and often circle slowly over the same spot for a long time. This makes for calm, close encounters, mostly on scuba. The coral itself is precious: if divers crowd it or kick it, the mantas may stop coming.

Feeding sites

When plankton is thick, mantas feed near the surface. They swim with their mouths wide open, sometimes looping in backward somersaults, and in a few famous places dozens gather at once. This is when snorkellers get the best views. Feeding mantas move fast and change direction often, so give them room.

The basic rule, from the Manta Trust’s research and our own marine life guide, is simple:

So choose your island with the season in mind: east from May to November, west in the drier months. Mantas visit cleaning stations through much of the year, but feeding aggregations follow the plankton and the monsoon.

For the weather side of the same decision, see the best time to visit the Maldives. The atolls guide helps you picture which islands sit on which side.

Hanifaru Bay, Baa Atoll

Hanifaru Bay is the Maldives’ best-known manta site: a small, shallow bay where, at certain tides, plankton is trapped and on good days large numbers of mantas feed together. Peak season is around July to October.

The bay was declared a protected area on 5 June 2009, extended on 5 June 2011, and is a core zone of the Baa Atoll UNESCO Biosphere Reserve, designated in 2011. Because it is so popular, it is tightly managed. As reported in published factsheets:

• Snorkelling only; scuba diving inside the bay is not allowed.
• A limit on the number of boats and people in the bay at one time.
• Every group must be led by a certified Hanifaru guide.
• An entrance fee is charged, and rangers enforce the rules on site.

Fees and limits have changed over the years, so check the current rules before you go.

Closer to Malé

You do not need a domestic flight to see mantas. North and South Malé Atolls have cleaning stations and seasonal feeding spots within reach of the airport.

Take Dhiffushi, a local island on that eastern rim, about 37 km north-east of Malé and 40 to 50 minutes by shared speedboat. Its nearby Manta Bay (Dhiya Adi Faru) is a dive site of two small thilas where feeding mantas come in from about May to November. The island’s manta and whale shark season page sets out the timing, and the whale shark and manta ray full-day trip combines mantas with a long run to South Ari. Sightings are never guaranteed.

Both work, and many people do both.

• Snorkelling is best at feeding sites, where mantas come close to the surface. You need to be a confident swimmer in open water, as trips often start from a boat in a channel or bay. A life vest or float helps if you are unsure.
• Diving gives you long, calm encounters at cleaning stations. Some manta sites have currents and are better for divers with some experience; ask the dive centre about the site before booking.

Our guides to snorkelling in the Maldives and diving in the Maldives cover kit, costs and safety in more detail.

Local island or liveaboard?

From a local island, manta trips are affordable half-day or full-day boat outings arranged on the island, and if the sea is rough you simply go another day. Liveaboards follow the mantas from site to site, which suits dedicated divers. For most independent travellers, a guesthouse on a well-placed local island in the right season is the simplest option.

The Manta Trust’s best-practice code of conduct is based on years of research in the Maldives. A study of manta encounters here found that chasing, blocking a manta’s path and getting closer than about three metres made mantas more likely to swim off. It also found that fewer than half of encounters followed the guidelines. Your behaviour really does change what you see.

• Keep your distance. Stay at least 3 metres away, more from the tail. Let the manta choose how close to come.
• Never touch. Touching damages the mucus layer that protects a manta’s skin from infection.
• Don’t chase or block. Swim alongside at a calm pace, never in front of a manta or directly above it.
• Enter quietly. Slide into the water gently from the boat; splashing and kicking at the surface scare mantas away.
• No flash. Turn off flash and video lights.
• Respect the cleaning station. Divers should stay low and to the side, hover off the coral and never kneel or hold on to the reef.
• Fewer people, better encounters. If there are many swimmers around one manta, hang back and wait your turn.
• Listen to your guide. Protected sites have their own rules, and a good guide briefs you before you get in.

Wear a rash vest rather than lots of sunscreen, and bring a camera without flash: a clear belly shot helps researchers. Our responsible travel guide has more on reef-friendly habits.