Manta rays live in tropical, subtropical, and warm temperate seas around the world, and where you find one depends on the species. Reef manta rays stay close to coasts across the Indian and Pacific Oceans, oceanic manta rays range over open water, offshore islands, and seamounts, and the Atlantic manta ray lives only in the Atlantic, from the eastern United States to Brazil. All of them are capable divers: tagged mantas have reached 672 meters (2,200 feet), mostly at night.
This guide is written by the scientists of the Marine Megafauna Foundation, whose research described all three manta ray species and underpins their IUCN Red List assessments.
Where do manta rays live?
Manta rays occur throughout the warm waters of the world’s oceans, but the three species divide that space differently. Until MMF co-founder Dr. Andrea Marshall separated reef and oceanic mantas in 2009, every manta record was filed under a single name, so much of the older distribution data has had to be sorted by species after the fact.
The reef manta ray (Mobula alfredi) is widely distributed in tropical and subtropical waters throughout much of the Indian and Pacific Oceans, from the Red Sea and South Africa to Japan, Australia, Hawaii, and French Polynesia. Its range edges are still moving: in 2023 we extended the known range 140 kilometers (87 miles) south along the African coast to Mdumbi Beach in South Africa, and two years later a South African study co-authored by MMF’s Nakia Cullain pushed it more than 500 kilometers (310 miles) further, to Port Ngqura in the Eastern Cape. At the other extreme, a single reef manta photographed at Cocos Island, Costa Rica, was the first record of the species on either side of the Americas, nearly 6,000 kilometers (3,700 miles) from the nearest confirmed sighting in the Marquesas Islands, which suggests that individual may have crossed open ocean to get there.
The oceanic manta ray (Mobula birostris) was assessed in 2020 as circumglobal in tropical and temperate waters. That assessment predates 2025, however, when the western Atlantic animals were described as a separate species, the Atlantic manta ray (Mobula yarae). The oceanic manta remains in all three oceans, however: the 2009 redescription records it living alongside the Atlantic form in parts of the Atlantic and Caribbean, and the 2020 assessment, prepared with the coming split in view, keeps its range circumglobal across the Pacific, Indian, and Atlantic Oceans. Oceanic mantas also reach cooler water than reef mantas: in Australia their coastal records span 10 to 40°S, and they visit northeastern New Zealand seasonally, the southernmost part of their range.
The Atlantic manta ray ranges from the eastern United States and the Gulf of Mexico to Brazil, including estuaries and river mouths, and has no IUCN Red List assessment yet. Its range and its Florida nursery are covered on the Atlantic manta ray page.
Do manta rays live near the coast or in the open ocean?
Reef mantas are coastal animals, usually found within a few kilometers of land, while oceanic mantas spend much of their lives offshore and come to coastlines, islands, and seamounts where food is reliable. Both species use shallow water by day, and both leave it to feed.
The Red List describes the reef manta as typically resident in productive near-shore environments such as coral and rocky reefs, island groups, atolls, and continental coastlines. The oceanic manta, in contrast, occurs where upwelling is regular: along coastlines, around oceanic islands, and at offshore pinnacles and seamounts, and it can spend long periods offshore without visiting shallow water at all.
Australia shows the difference in numbers: a national review compiled 11,614 records of reef mantas but only 32 coastal sightings of oceanic mantas, spread across a wider band of latitude, the signature of a species that lives mostly offshore.
Where the two species meet, they share coastlines without sharing every site. Genetic work co-authored by MMF scientists describes their ranges as an extensive mosaic and suggests that habitat choice may have played a significant role in splitting them in the first place. In South Africa, citizen science records identified 139 reef mantas and 45 oceanic mantas; 89% of the reef mantas were seen in iSimangaliso Wetland Park, whereas the largest share of oceanic mantas, 48%, was recorded at Aliwal Shoal. In the Philippines, a national database we contributed to found mantas at 22 sites, with 392 reef and 107 oceanic mantas identified, and four sites in Masbate and Palawan hosting 89% of all individuals.
Do manta rays stay in one place?
Many reef mantas are strongly resident, returning to the same reefs year after year, yet others in the same population travel widely. Researchers describe the species as partial migrants, where some individuals migrate while others remain resident.
Southern Mozambique illustrates both sides. At Závora Bay we identified 583 reef mantas between 2010 and 2021, and more than half were seen again, one of them 18 times. Acoustic tracking led by MMF’s Stephanie Venables along 350 kilometers (220 miles) of the Inhambane coast recorded tagged mantas returning to the same site up to 30 times, sometimes after seven months away, with 89.2% of detections in daylight, mostly at cleaning stations. The same mantas could also move fast: one mature female made a 186-kilometer (116-mile) round trip in 25.2 hours, about 7 kilometers per hour.
Residency is even stronger at some remote sites. At Egmont Atoll in the Chagos Archipelago, tagged reef mantas showed 77% residency, the highest yet reported for the species. In the Seychelles, 89% of detections came within 2.5 kilometers (1.6 miles) of two neighboring islands. Off the Samarai Islands of Papua New Guinea, 75% of satellite-tag positions fell within 10 kilometers (6 miles) of the tagging site, and the farthest any tagged manta strayed was 86.9 kilometers. Around Mayotte, in the Mozambique Channel, we found that several reef mantas have used the island’s lagoon for more than 10 years, and that none of our satellite-tracked animals left local waters.
Fidelity can also be fine-grained. In Komodo National Park, where we have identified 1,085 reef mantas, mantas show distinct preferences between two sites only about 5 kilometers (3 miles) apart, and females move between sites more than males. Oceanic mantas are looser in their habits: off coastal Ecuador, only 12.9% of 2,803 identified mantas were ever seen again.
The consequence for conservation is double-edged. A resident population can be protected by protecting a few sites. However, the Red List notes that low connectivity and high residency leave reef mantas vulnerable to local depletion and regional extinction.
How far do manta rays travel?
How far a manta travels depends on what is measured. Satellite-tagged reef mantas off eastern Australia swam tracks of up to 2,441 kilometers (1,517 miles) in 118 days, acoustic tags have recorded a one-way movement of 950 kilometers (590 miles) between Mozambique and South Africa, and a tagged oceanic manta reached the Galápagos Islands about 1,300 kilometers (810 miles) from where it was tagged off Peru. Even so, matching photo-identification catalogs between regions has not detected oceanic mantas crossing ocean basins.
These figures are not interchangeable, because studies report three different kinds of distance. Cumulative distance adds up every leg of a satellite track, or every trip a photographed manta makes between two sites; one-way distance is the gap between the start and end of a single movement; and range extent is the span of the whole area an animal used. A manta can accumulate a long cumulative distance while remaining within a small range, so each measure answers a different question.
Photo-identification produced the first long-distance records. Comparing 2,604 encounters collected by recreational divers across Indonesia, MMF’s Elitza Germanov matched reef mantas between Nusa Penida, the Gili Islands, and Komodo National Park, sites up to 450 kilometers (280 miles) apart, through some of the most heavily fished and trafficked water in the country. In southern Africa, we confirmed the species’ first movements across an international border: one manta traveled 505 kilometers (314 miles) one way from Praia do Tofo to Sodwana Bay, and another made a round trip of about 870 kilometers (540 miles) between Závora and Sodwana. Later citizen science work added 32 more cross-border records, including a reef manta whose repeated trips between iSimangaliso Wetland Park and Závora added up to 1,305 kilometers (811 miles) and another that moved more than 600 kilometers (370 miles) one way within South Africa, and suggested that the southern African population is one of the most mobile known.
Acoustic tracking has since shown how often those crossings happen. In a 2026 study led by MMF’s Nakia Cullain, about 30% of 48 acoustically tagged reef mantas moved between Mozambique and South Africa between 2022 and 2025, with the longest one-way movement spanning 950 kilometers (590 miles) and the longest round trip 1,100 kilometers (680 miles). The same mantas showed high residency within iSimangaliso Wetland Park, particularly its offshore wilderness zone, where strict protection and reduced human activity may provide a refuge; the threats chapter covers what these results mean for protection.
Satellite tags show what happens between sightings. Reef mantas tagged at Lady Elliot Island on Australia’s southern Great Barrier Reef, in a study co-authored by MMF’s Chris Rohner, swam cumulative tracks of up to 2,441 kilometers (1,517 miles) in 118 days, ranged across 1,035 kilometers (643 miles) of latitude, and ventured up to 155 kilometers (96 miles) beyond the continental shelf, spending much of their time in an offshore eddy that appears to be an important foraging ground. Distance traveled and distance from home are different measures, though. Around Mayotte, our tagged mantas swam tracks of up to 1,579 kilometers (981 miles) in four months yet stayed within about 285 kilometers (177 miles) of the island.
For oceanic mantas, a satellite-tagged animal off northern Peru reached the Galápagos Islands, about 1,300 kilometers (810 miles) west-northwest of where it was tagged. Off Mexico, photo-identification and acoustic tags linked the offshore Revillagigedo Archipelago with the mainland coast, with the longest transit about 560 kilometers (350 miles).
When do manta rays visit aggregation sites?
Most manta aggregations are seasonal, and the timing follows food: sightings rise and fall with monsoon winds, water temperature, plankton, tides, and the moon. Because each site has its own oceanography, there is no single manta season.
Around the Indian Ocean, each site keeps its own calendar, and at several it follows the monsoons. In southern Mozambique, encounters at Závora Bay peak from July to November. In the Seychelles’ Amirante Islands, reef mantas are present year-round but most often detected from November to April, during the northwest monsoon, and especially at new moon. Egmont Atoll, in the Chagos Archipelago, is used year-round with peaks in the southeast monsoon, and the mantas may rely on the atoll when food is limited elsewhere in the Indian Ocean.
At a single feeding site, the timing can be finer still. At Hanifaru Bay in the Maldives, detections rise with westerly winds, near new and full moons, just after high tide, conditions that appear to concentrate zooplankton; when feeding conditions are poor, the mantas appear to move to nearby cleaning stations instead. (For what they eat and how, see the feeding chapter.)
Seasons also drive movement between sites within a region. In northern Raja Ampat, Indonesia, tagged reef mantas made seasonal movements along a corridor about 150 kilometers (93 miles) long, and none were detected at receivers 180 kilometers to the south.
Oceanic manta sites follow the same logic. At Bahía de Banderas, Mexico, sightings peak around April and track sea temperature, moon phase, and tidal range, and acoustic tags there recorded two peaks of occupancy each year. Oceanic manta sightings in Raja Ampat rose sharply during the 2015–2016 El Niño. Off the eastern United States, a distribution model co-authored by MMF’s Jessica Pate predicts mantas nearshore off northeastern Florida in April, north of Cape Hatteras from June to October, and south of Savannah from November to March, following water of about 20 to 30 °C (68 to 86 °F). Those records predate the 2025 species split, so they mix Atlantic and oceanic mantas.
Are oceanic manta rays highly migratory?
Less than was assumed. Satellite tags, stable isotopes, and genetics show that oceanic mantas tend to stay within a region for years at a time, even though individuals can make long journeys.
Because oceanic mantas live offshore, they were long classed as highly migratory, and conservation efforts were designed at an international scale on that basis. A study combining three methods tested the assumption at sites 600 to 13,000 kilometers apart. Mantas tagged in Raja Ampat and Pacific Mexico made no long-range migrations and occupied non-overlapping ranges, while their chemical signatures (stable isotopes, which record where an animal has been feeding over months) and their genetics showed that the separation persisted across years and generations. The authors concluded that local or regional management could prove more effective than international-scale strategies alone.
That does not make oceanic mantas sedentary. Off Mexico, 22 individuals moving between the Revillagigedo Archipelago, Bahía de Banderas, Bahía de Navidad, and the Gulf of California over 21 years point to a metapopulation linking offshore islands with the mainland, that is, separate groups joined by occasional movement. In the southeast Pacific, satellite tracks link northern Peru, Isla de la Plata in Ecuador, and the Galápagos, raising the possibility of one regional population.
There is a tension here. The tagging and genetic work above found structure within regions, whereas a global genomic comparison found oceanic mantas more genetically connected worldwide, and more genetically diverse, than reef mantas. One way to reconcile them is time: a few migrants per generation can keep genes flowing between regions over millennia, yet are far too few to replace mantas removed by a local fishery.
Are manta ray populations connected?
Reef manta populations are genetically distinct from one region to the next, while oceanic mantas are more connected worldwide. Within a region, though, reef mantas can form a single well-mixed population.
In Mozambique, our analysis of more than 3,000 genetic markers from 114 mantas found no population structure along the southern coast, so southern Mozambique’s reef mantas should be managed as one population. The same study found strong differences from Western Australia, showing that the open Indian Ocean is a barrier they rarely cross. At the global scale, reef mantas carry less genetic diversity and are more isolated than oceanic mantas, and the authors warn that fisheries could disrupt population dynamics at both local and global scales.
Connectivity is not uniform, even inside one archipelago. Raja Ampat’s reef mantas are managed as a single population across 6.7 million hectares, yet a network of 34 acoustic receivers tracking 72 mantas found three demographically and geographically distinct subpopulations, linked through a few hub sites. One hub, Eagle Rock, emerged as a critical node in the movement network.
The two manta species are themselves recent offshoots of one another. Genetic analysis co-authored by MMF scientists estimated that they diverged less than half a million years ago, with some gene flow continuing after the split.
How deep can manta rays dive?
Far deeper than their surface habits suggest. The deepest recorded dives are 672 meters (2,200 feet) for a reef manta off New Caledonia and 648 meters (2,130 feet) for an oceanic manta off Peru, although most of their time is spent in the top few tens of meters.
In New Caledonia, all nine satellite-tagged reef mantas dived below 300 meters (980 feet), one to 672 meters, extending the known depth range of the species by more than 200 meters. Before that, the record was 432 meters (1,420 feet), from the Red Sea, where six of seven tagged mantas made a combined 76 dives below 150 meters. Around Mayotte our tags recorded a maximum of 397 meters (1,300 feet), with frequent dives into the mesopelagic zone (the twilight layer between 200 and 1,000 meters), even though the median swimming depth was about 30 meters (100 feet).
The deepest oceanic manta dive, off northern Peru, was a 50-minute plunge to 648 meters made just after the animal left the continental shelf; otherwise the same mantas showed a strong preference for water shallower than 2 meters. Tagged oceanic mantas in New Zealand spent most of their time shallower than 5 meters (16 feet), with occasional dives to 365 meters (1,200 feet). The Red List gives the oceanic manta’s depth range as the surface to 1,000 meters (3,300 feet), deeper than any tagged dive yet published.
The main reason to go deep is probably food. Off Socorro Island in Mexico, a submersible crew filmed an oceanic manta feeding in a thick layer of zooplankton at 130 to 140 meters (430 to 460 feet), and tag data from the same area show mantas centering their time around the top of the thermocline, where zooplankton often concentrate. Chemical analysis of muscle tissue from Ecuador suggests that most of an oceanic manta’s diet comes from the deep, not from the surface plankton people see them eating.
Why do manta rays dive deeper at night?
In several studied populations, tagged mantas spend daylight near the surface and dive deeper after dark, a pattern called reverse diel vertical migration, although it varies between habitats and individuals. The leading explanation is that they are following zooplankton that become reachable in the water column at night.
“Reverse” is relative to the classic pattern, in which animals spend the day deep and come shallower at night. Reef mantas in the Red Sea stayed in the top 10 meters (33 feet) by day and went deeper at night, and in New Caledonia most of the deepest dives happened at night, which the authors suggest may mean surface plankton around those reefs is not enough to sustain the mantas. Off Peru, all three tagged oceanic mantas dived deeper at night than by day, oscillating up and down through the water column after dark.
The Peru study also proposes why mantas keep coming back up: their dives took them into water up to 10 °C (18 °F) cooler than the surface for as long as three hours, so they may return to the surface to rewarm between feeding dives. Body temperature and feeding were not measured directly, so this remains a hypothesis.
The pattern is common rather than universal. The same Peru study noted that reef mantas in the Chagos Archipelago show the classic pattern instead, and its offshore manta switched between both as it moved through different habitats, going deeper on brighter, moonlit nights. Around Mayotte, our tagged mantas were shallowest at sunrise and in the early morning, at about 5 meters, possibly feeding at the surface.
Daily rhythms like these have practical consequences. Daytime surface use brings mantas to cleaning stations and to the divers who visit them (see swimming with manta rays), but it also puts them at risk from entanglement and vessel strikes. At night, the depth a manta occupies determines which fishing gears it can be caught in, which is why region-specific diving data help design bycatch rules.
How do scientists track manta rays?
With three complementary tools: photo-identification from each manta’s unique belly spots, acoustic receivers that log tagged mantas visiting particular sites, and satellite tags that record depth and location before detaching. Animal-borne cameras, genetics, and chemical tracers fill in what those miss.
Photo-identification works because every manta’s ventral spot pattern is unique and does not change over the years, so a photograph identifies an individual as reliably as a tag (the anatomy chapter explains the markings). MMF scientists helped build Manta Matcher, an algorithm that matches spot patterns automatically, even in poor underwater photographs. Because anyone with a camera can contribute, many of the movement records above came from divers’ and dive operators’ photographs.
Acoustic telemetry traces movement between known sites. Each tagged manta carries a small transmitter, and receivers moored on reefs log every pass within range; our Mozambique array used 14 receivers along 350 kilometers of coast to follow 42 mantas over several years. The limitation is that a manta is invisible whenever it is away from a receiver.
Satellite tags fill those gaps. Pop-up archival tags record depth, temperature, and light, then release from the manta and transmit a summary; a recovered tag can yield millions of readings, such as the 2.6 million data points from three Red Sea tags. Positions estimated from light levels are coarse, although in the Seychelles adding acoustic detections significantly reduced the errors. GPS tags now give much finer detail, mapping oceanic manta movements in New Zealand at scales of 100 meters to 10 kilometers.
Animal-borne video cameras add behavior to the tracks. Cameras fitted to reef mantas in the Maldives and oceanic mantas off Mexico showed reef mantas spending 43% of recorded time with other mantas, against 8% for oceanic mantas, and filmed reef manta courtship deeper than recreational divers can go; the authors caution that those comparisons come from two populations only.
MMF uses these tools in Mozambique, South Africa, Indonesia, and Florida, and our Hawaii Oceanic Manta Project is building the first distribution baseline for oceanic mantas in Hawaii.
Why it matters for conservation
Movement data tell managers the scale at which protection has to work: individual sites for resident reef mantas, whole coastlines and borders for those that travel, and regions for oceanic mantas.
In Mozambique, our acoustic tracking found that existing marine protected areas covered only about 24% of the area the tagged mantas used, and we recommended protecting critical habitat at Praia do Tofo and Závora and expanding the Bazaruto Archipelago boundaries. The cross-border records from South Africa support the species’ listing under the Convention on Migratory Species and point to regional, transboundary management; our 2026 acoustic study accordingly recommends harmonized fishing and trade regulations between Mozambique and South Africa. Oceanic mantas were listed on both CMS appendices in 2011 and reef mantas in 2014. In Indonesia, where manta movements ran through heavily fished water between sanctuaries, the government protected manta rays nationwide in 2014, following a 2013 fishing ban in and around Komodo National Park. Off the United States, distribution models are designed to help agencies reduce bycatch, boat strikes, and other threats.
Movements also reveal losses that range maps hide. In northwest Madagascar, reef mantas used to be seen off Nosy Be, but there have been no confirmed records since 2015, which suggests a potential local decline. Because reef mantas are so resident and so slow to reproduce, a lost aggregation is unlikely to be replaced quickly from elsewhere (the threats chapter covers why, and the reproduction chapter covers the nurseries that sustain each population).
Every identification photo and every tag adds to the map of where mantas need protection. You can adopt a manta ray to support new research on manta rays.