MANTA RAY
FACTS.

Top 10 manta ray facts

1. Manta rays are the world’s largest rays. Oceanic mantas can reach about 7 meters (23 ft) from wing tip to wing tip.
2. Scientists now recognize three manta species. MMF co-founder Dr Andrea Marshall described all three.
3. Manta rays are harmless to people. Unlike stingrays, they have no stinging barb.
4. These filter feeders eat tiny drifting animals called zooplankton.
5. Every manta ray has a unique pattern of belly spots, much like a fingerprint.
6. Small fish clean mantas by picking parasites from their skin at places called “cleaning stations.”
7. A female manta usually gives birth to one pup every two or more years, after a pregnancy lasting about a year.
8. Photo-ID studies show that manta rays live for at least 30 years, and probably much longer.
9. Much of an oceanic manta ray’s diet comes from the deep “twilight zone,” far below the surface.
10. The IUCN Red List classifies the oceanic manta as Endangered and the reef manta as Vulnerable.

How big are manta rays?

The oceanic manta ray (Mobula birostris) is the largest of the three species. It can reach about 7 meters (23 ft) in disc width, measured between the tips of its wing-like fins. The reef manta ray (Mobula alfredi) is smaller. Most adults measure between 3 and 4.9 meters across, based on our long-term study of over 800 individuals in Mozambique.

For comparison, that makes a big oceanic manta wider than a giraffe is tall — but its food is almost too small to see.

Manta ray vs stingray: what’s the difference?

Manta rays and stingrays are related, but their bodies and behavior differ:

• No stinger. Stingrays have a venomous tail barb for self-defense. Manta rays have no barb, so they cannot sting people.

• Different food. Most stingrays crush crabs, clams, and other prey from the seafloor. Mantas filter tiny drifting animals (zooplankton) from open water.

• Different lifestyle. Stingrays spend much of their time on or near the bottom, often buried in sand. Mantas keep moving through open water.

• Different brains. Mantas are active, curious animals that investigate divers and learn their local surroundings.

Are manta rays dangerous?

No. Manta rays have no stinger and do not hunt large prey or bite people. People swim safely with mantas around the world, and well-run tourism can support conservation. The real danger runs the other way: boat strikes, fishing gear, and crowded or poorly run tourism can harm mantas. That is why researchers developed evidence-based codes of conduct for swimming with them.

What do manta rays eat?

Manta rays eat zooplankton: tiny drifting animals such as copepods, krill, and fish larvae. A feeding manta swims with its wide mouth open, sending water over special filter plates on its gills. It may somersault through a dense patch of food to catch more.

Surface feeding tells only part of the story. Our stable-isotope research on oceanic manta rays in Ecuador found that most of their diet did not come from surface waters. Chemical signals in their muscle pointed to prey from the mesopelagic “twilight zone,” hundreds of meters down. Much of the food eaten by the world’s largest ray comes from the deep.

Where do manta rays live?

Manta rays live in tropical and subtropical oceans around the world. Reef manta rays stay close to coasts and return to favorite reefs, cleaning stations, and feeding sites. This lets researchers follow the same individuals for decades in places such as southern Mozambique, the Maldives, Hawaii, and Indonesia. Oceanic mantas roam farther across open water, and our genetic research shows that their populations are more connected across ocean basins than the isolated coastal populations of reef mantas.

That difference matters for conservation. If fishing removes an isolated reef manta population, few replacements can arrive from elsewhere, so recovery may take a long time.

How many manta ray species are there?

Three. MMF co-founder Dr Andrea Marshall described all three. Until 2009, science recognized only one manta species. Andrea’s research in Mozambique identified two: the giant oceanic manta ray and the smaller reef manta ray. The reef manta was the first new manta species recognized in more than 50 years. The same paper reported evidence of a possible third species in the Atlantic. In 2025, scientists formally described the Atlantic manta ray (Mobula yarae), using a type specimen from our Florida Manta Project.

How do manta rays reproduce?

Manta rays reproduce more slowly than almost any other fish. A female gives birth to one pup, or rarely two, after a pregnancy lasting about a year. She typically gives birth only every two or more years. Pregnancy can be hard to spot: in 2026, researchers including MMF’s Jessica Pate used an underwater ultrasound to confirm pregnancy in three wild oceanic mantas in Mexico, and one of them showed no visible bulge at all. Our research in Mozambique found that 99% of females’ mating scars were on the left wing. This made mantas the first shark or ray known to show “handedness” in their behavior.

Manta courtship follows a clear pattern. A 14-year study in the Maldives co-authored by Guy Stevens documented the full sequence for the first time. Females lead “courtship trains” of pursuing males through seven stages. The researchers recorded 90% of courtship at cleaning stations, where mantas gather on the reef.

How long do manta rays live?

Photo-identification studies have recorded the same reef manta rays for at least 30 years. Those records cover only the individuals studied for the longest time, so true lifespans are probably much longer. Long lives, late maturity, and one pup at a time give mantas some of the lowest population growth rates of any fish. That is why depleted populations recover so slowly.

How do scientists tell manta rays apart?

Every manta ray has a unique pattern of spots and blotches on its underside. This natural ID card remains recognizable for life. Our photo-identification research in Mozambique used these patterns to identify more than 800 reef mantas. Researchers now use the same method around the world. A photograph of a manta’s belly can become a scientific data point.

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 listed as Endangered and the reef manta ray as Vulnerable on the IUCN Red List. The main threats:

• Fishing and the gill plate trade. Fishers catch mantas and their devil ray relatives in at least 43 countries. One driver is the international trade in their gill plates for a tonic with no proven health benefit.

• Slow reproduction. With only one pup every few years, even modest fishing pressure can push a population into decline.

• Plastic pollution. Our research in Indonesia estimated that feeding manta rays may swallow up to about 63 pieces of plastic per hour during the worst seasons.

• Local collapses. At Praia do Tofo in southern Mozambique, our long-term monitoring recorded declines of more than 90% in manta and devil ray sightings. Two decades of surveys show no recovery.

Progress is clear in a 2026 global review, which documents stronger protection for manta and devil rays where rules are enforced. Our manta ray projects in Mozambique, Florida, and Indonesia provide the long-term data those protections depend on. You can help by adopting a manta ray.