MANTA RAY
FACTS.

Top 10 manta ray facts

1. Manta rays are the largest rays in the world: the oceanic manta reaches about 7 meters (23 feet) from wing tip to wing tip.
2. There are three species: the reef manta ray, the oceanic manta ray, and the Atlantic manta ray, which was formally described in 2025.
3. No manta ray can sting. Reef mantas have no tail spine, and oceanic and Atlantic mantas carry only a small, non-functional remnant of one at the base of the tail.
4. Mantas are filter feeders that eat zooplankton, and in Ecuador, most of the oceanic manta’s diet appears to come from deep water.
5. Every manta has a unique pattern of spots on its underside that does not change substantially over the years, so a photograph identifies an individual.
6. Small cleaner fish pick parasites and dead skin from mantas at cleaning stations, and 90% of the courtship recorded in the Maldives took place at these sites.
7. A female usually gives birth to a single pup after a pregnancy of about a year.
8. Individual reef mantas have been photographed across 30 years, so they live at least that long.
9. Manta rays have one of the lowest population growth rates of any shark or ray, so a depleted population recovers slowly.
10. The IUCN Red List classifies the oceanic manta as Endangered and the reef manta as Vulnerable, and since 5 March 2026 all manta and devil rays have been listed on CITES Appendix I.

How big are manta rays?

The oceanic manta ray (Mobula birostris) is the largest ray in the world, reaching about 7 meters (23 feet) in disc width, the distance from wing tip to wing tip. The reef manta ray (Mobula alfredi) is smaller, with most adults between 3 and 4.9 meters (10 and 16 feet) across.

The 2009 redescription of the genus puts the oceanic manta’s maximum disc width at over 7 meters, and the IUCN Red List notes anecdotal reports of up to 9.1 meters (30 feet). Reef mantas reach a maximum of about 5 meters (16 feet) but rarely exceed 4 meters (13 feet). In southern Mozambique, most adult reef mantas we photographed measured 3 to 4.9 meters across.

Reef manta pups are born at 1.3 to 1.5 meters (4 to 5 feet), and in Mozambique males mature at about 3 meters (10 feet) and females at about 3.9 meters (13 feet). The size chapter covers how scientists measure mantas and why size varies.

Manta ray vs stingray: what’s the difference?

Manta rays belong to the same order of fishes as stingrays, but they live in open water and filter plankton, whereas most stingrays live on or near the seabed and feed on bottom-dwelling prey. Mantas also lack the venomous tail spine that most stingrays use in defense.

Within that order, manta and devil rays form their own family, the Mobulidae, which split from the lineage of the cownose rays around 30 million years ago. Genetic studies place the mantas within the devil ray genus, which is why all three species now carry the genus name Mobula.

The body plan follows from the diet. A feeding manta swims forward with its mouth open while its cephalic lobes, the two flexible fins on either side of the head, guide water into the mouth; rigid plates on the gills then sieve out food particles before the water leaves through the gill slits. The anatomy chapter covers the manta’s body in detail.

Do manta rays have stingers?

No manta ray can sting. Reef mantas have no tail spine at all, while oceanic and Atlantic mantas carry a small, non-functional residual spine enclosed in a bulb at the base of the tail.

To scientists, the spine is an identification feature, not a weapon. The 2009 study that separated reef and oceanic mantas used spine morphology, alongside coloration, teeth, and skin denticles, to tell the two species apart, and the 2025 description of the Atlantic manta lists a caudal bulb carrying a residual spine among that species’ diagnostic features. A swelling at the base of the tail therefore marks an oceanic or Atlantic manta, not a dangerous one.

Are manta rays dangerous?

No. Manta rays are harmless to people: they feed on plankton, cannot sting, and do not attack swimmers or divers.

As a review we co-authored put it, these rays are now known to be harmless to humans. The danger runs the other way. In Florida, our team found that 27% of juvenile mantas carried fishing-line entanglement injuries. Poorly managed tourism also disturbs them: in the Maldives, swimmers who chased, obstructed, or approached feeding mantas from the front caused them to stop feeding, and interactions closer than 3 meters (10 feet) increased avoidance. Florida’s juvenile Atlantic mantas spent 37% of their time avoiding divers when divers were present.

Well-run tourism, however, makes live mantas valuable: a 2013 estimate put manta ray tourism at about US$140 million a year worldwide. The Maldives results support an evidence-based code of conduct for swimming with mantas. The tourism chapter covers where to see mantas and how to do it responsibly.

What do manta rays eat?

Manta rays eat zooplankton, the small animals that drift in the water, especially crustaceans such as copepods and krill, along with some small fishes. They filter this food from the water rather than hunting individual prey.

Stomach contents from oceanic mantas landed by fisheries in the Philippines’ Bohol Sea held krill, lanternfishes, and copepods. Mantas are also selective feeders: on the southern Great Barrier Reef, reef mantas began feeding only once plankton reached a threshold density, and at Hanifaru Bay in the Maldives they target dense, tidally driven swarms dominated by copepods.

The feeding that divers see at the surface is only part of the picture. Our stable isotope work on oceanic mantas in Ecuador found chemical signatures in their muscle that suggest the majority of their diet is of mesopelagic origin, that is, from the “twilight zone” hundreds of meters down. Tag data agree: off northern Peru, oceanic mantas dived deeper at night than by day, one reaching 648 meters (2,130 feet), apparently following plankton that migrates up and down each day. The feeding chapter covers feeding strategies and cleaning stations.

Where do manta rays live?

Manta rays live in tropical, subtropical, and warm temperate seas around the world, but each species has its own range. Reef mantas live along coastlines of the Indian and Pacific Oceans, oceanic mantas range more widely offshore across the Pacific, Indian, and Atlantic Oceans, and Atlantic mantas occur only in the Atlantic and Caribbean, where the two species live side by side.

Reef mantas are coastal animals of the tropical and subtropical Indian and Pacific Oceans, and they return to the same reefs, cleaning stations, and feeding sites for years. They do travel, though. Our photo-identification work in Indonesia matched individuals up to 450 kilometers (280 miles) apart, and in 2023 we documented the species’ first confirmed international border crossing, 505 kilometers (314 miles) from Praia do Tofo in Mozambique to Sodwana Bay in South Africa.

Oceanic mantas were long assumed to be great migrators, but satellite tags at four Indo-Pacific sites showed no long-range migrations and non-overlapping ranges. The largest known population is in coastal Ecuador, where a study we co-authored identified 2,803 individual oceanic mantas. The Atlantic manta, meanwhile, ranges from the eastern United States and the Gulf of Mexico through the Caribbean to Brazil, and our team has identified a nursery for juveniles off southeast Florida.

Genetics shows why these differences matter. We found no genetic population structure among reef mantas along the southern Mozambique coast, but strong differences from Western Australia, and a global study found that oceanic mantas are more genetically connected and more diverse than reef mantas. An isolated reef manta population that is fished out therefore cannot count on replacements from elsewhere. The movements chapter covers residency, migration, and diving.

How many manta ray species are there?

Three: the reef manta ray (Mobula alfredi), the oceanic manta ray (Mobula birostris), and the Atlantic manta ray (Mobula yarae), which was formally described in 2025.

Until 2009, science recognized a single manta species. Working from animals off southern Mozambique, MMF co-founder Dr. Andrea Marshall showed that there were two and resurrected the name Manta alfredi for the smaller, coastal species. The same paper flagged a possible third species in the Atlantic. Genetic studies later found robust evidence for a new manta species in the Gulf of Mexico.

In 2025, a 15-author team led by Nayara Bucair, with MMF scientists including Jessica Pate among the authors, described the Atlantic manta ray. The specimen that anchors the description was collected by our Florida Manta Project team. The anatomy chapter explains how to tell them apart.

How do manta rays reproduce?

Manta rays give birth to live young, usually a single pup after a pregnancy of about a year. Most females then wait at least a year before their next pregnancy.

Our long-term study of reef mantas in southern Mozambique estimated gestation at about 12 months and found that most females bred every second year, although a few were pregnant in consecutive years and two pups were occasionally conceived. Across populations, the reef manta’s Red List assessment gives a typical cycle of one pup every 4 to 5 years, within a range of 1 to 7, so a female may produce only 4 to 7 pups in her lifetime. Female reef mantas mature at 8 to 17 years old, depending on the region and food supply. For the oceanic manta, the assessment estimates maturity at about 8.6 years and assumes the reef manta’s breeding cycle, because its reproductive periodicity is unknown, and the Atlantic manta’s life history has not yet been measured.

Courtship is an elaborate process. A 14-year study in the Maldives described seven stages, from the “courtship train” of males pursuing a female through to copulation and separation, with 90% of courtship taking place at cleaning stations. During mating the male grips the tip of the female’s pectoral fin in his mouth, and in Mozambique we found that 99% of these mating scars were on the left fin, the first behavioral left-right bias reported in any shark or ray.

Pregnancy can also be hard to see. In 2026, a team including MMF’s Jessica Pate used contactless underwater ultrasound on free-swimming oceanic mantas in Mexico’s Revillagigedo National Park and confirmed three pregnancies; the female in mid-pregnancy showed no outward swelling at all. The reproduction chapter covers courtship, pregnancy, and nursery areas.

How long do manta rays live?

Reef manta rays live for at least 30 years, and probably considerably longer, because individuals have been photographed across three decades. Oceanic mantas have been resighted up to 20 years after they were first identified, and the IUCN Red List estimates a maximum age of about 45 years for both species, based on the reef manta.

Two of the longest records are about 30 years. At Lady Elliot Island in eastern Australia, a male photographed as an adult in 1982 was seen again in 2012, which means he was well over 30 years old, and in Hawaii one female reef manta was resighted continuously from 1979, a minimum longevity of 31 years when the record was reported. Oceanic mantas are harder to follow over time, but have been resighted up to 20 years after they were first identified, and the Red List’s 45-year maximum for the species is borrowed from the reef manta’s longevity. The Atlantic manta has no lifespan estimate yet. Because a record can only begin when an animal is first photographed, true lifespans are likely longer.

Long life comes with late maturity and few young, and the combination gives manta rays one of the lowest maximum population growth rates of the 106 sharks and rays for which it has been calculated. As a result, recovery from heavy fishing can take decades. The lifespan chapter covers growth, age, and survival.

How do scientists tell manta rays apart?

Every manta ray has a unique pattern of spots and blotches on its underside, and because the pattern does not change substantially over the years, a photograph can identify an individual.

This method, photo-identification, underpins most of what is known about manta populations. Our first study in Mozambique identified 449 reef mantas between 2003 and 2007 and estimated a population of about 800 using the aggregation sites near Praia do Tofo. Since then, we have identified 1,085 mantas in Komodo National Park, and a study led by MMF’s Janis Argeswara, drawing on researcher and citizen-science photos, identified 814 at Nusa Penida, off Bali.

Photographs record more than identity. They show sex, pregnancy, injuries, and color: some populations include all-black (melanistic) mantas, and we found that the proportion ranges from 0 to 41% between populations. The anatomy chapter covers the field marks that separate the three species.

Are manta rays intelligent?

Reef manta rays have structured social lives and may communicate with one another, although intelligence itself is hard to measure in a wild animal.

In Raja Ampat, Indonesia, acoustic tracking of 27 reef mantas found that their social affiliations formed communities tied to particular sites, which remained stable for weeks to months. Video from cleaning stations there showed that mantas curl and uncurl their cephalic lobes when approaching other mantas, human divers, and cleaner fish; the authors, including MMF scientists, considered gestural communication the most likely explanation, though not yet confirmed.

Watch: the biology of the giant manta ray

MMF’s Jessica Pate, who leads the Florida Manta Project, is interviewed in this Real Science documentary on how manta rays feed, think, and navigate the open ocean. It has been watched more than 3 million times.

Why are manta rays endangered?

The oceanic manta ray is Endangered and the reef manta ray Vulnerable on the IUCN Red List, mainly because of targeted fishing and bycatch. Their slow reproduction means that even modest catches can drive a population down.

In its 2020 assessment of the oceanic manta, the Red List concluded that the species had suffered a suspected population reduction of 50–79% over three generations (87 years). The reef manta was assessed in 2019, with an amended version in 2022, and its suspected reduction over the same period is 30–49%. The Atlantic manta ray has not yet been assessed. Both assessments note an important exception: where mantas are protected and not fished, sighting trends appear stable.

Fishing is the main threat. A review we co-authored counted 13 fisheries that target manta and devil rays and 30 that catch them as bycatch, and a 2026 global analysis estimated that fisheries catch about 264,500 manta and devil rays a year, with 87% of that mortality in small-vessel fisheries. Much of the demand comes from the trade in dried gill plates, which vendors sell as a health tonic even though traditional medicine practitioners rarely prescribe it. A 2024 assessment found significant landings in 43 countries and gill plates selling for up to US$1,260 per kilogram. Mantas also face boat strikes, entanglement, and plastic pollution: we estimated that a feeding reef manta at Nusa Penida could swallow up to about 63 pieces of plastic an hour in the wet season.

Local declines show what is at stake. At Praia do Tofo in southern Mozambique, our surveys recorded an 88% decline in reef manta sightings between 2003 and 2011. By 2023 the decline had reached 99% for reef mantas and 92.5% for oceanic mantas, and fishing mortality is likely to have played a significant role.

Protection has grown substantially. Oceanic mantas were listed on both appendices of the Convention on Migratory Species in 2011 and reef mantas in 2014. Both species were listed on CITES Appendix II in 2014 (agreed in 2013), and since 5 March 2026 all manta and devil rays have been listed on CITES Appendix I, which bans international commercial trade. The United States listed the oceanic manta as Threatened under the Endangered Species Act in 2018, Indonesia protected all manta rays in 2014, and Mozambique banned their capture from 2021. At Nusa Penida in Indonesia, the reef manta population grew from about 170 in 2012 to about 450 in 2022. Our manta ray projects provide the long-term data these protections depend on, and the threats chapter covers them in depth. You can adopt a manta ray to support new research on manta rays.