Giant oceanic manta ray in the Maldives

Maldives field guide · ray

Giant oceanic manta ray.

Mobula birostris · also: Giant manta, Oceanic manta

The largest ray on Earth, with a wingspan that can exceed 7 m, roaming the open ocean rather than hugging reefs. Born fully independent, a pup must feed and fend for itself from its first moments. Encounters in the Maldives are rarer and more prized than with the resident reef mantas.

Size
Up to ~7 m disc width — the largest ray
Weight
Up to ~2–3 tonnes.
Diet
Zooplankton, often gathered by diving into deep-water plankton layers.
Lifespan
Over 45 years (true maximum uncertain).
Depth
Surface to ~1,000 m; dives into the deep scattering layer.
Reproduction
Live-bearing; a single pup with multi-year intervals between births.
Snorkel or dive
Dive
Best season
Variable / opportunistic
Conservation
Endangered

How to recognise it

Larger than reef manta; sharply defined T-shaped white shoulder patches; small blister at the tail base.

Behaviour in the wild

More pelagic than reef mantas; ranges deep current-swept channels and seamounts.

Where to see it in the Maldives

Less common than reef mantas; the deep south, notably Fuvahmulah, and outer oceanic channels.

Visual field notes

3 human-reviewed photographs chosen for identity, habitat and behaviour.

01 · Field portrait · Species reference

PhotoElias LevyCC BY 2.0web-adapted

02 · Identification · Maldives photograph

PhotoRichard HarveyPublic domainweb-adapted

03 · Behaviour & scale · Species reference

PhotoArturo de Frias MarquesCC BY-SA 4.0web-adapted

Recorded locations

Build a trip from real sighting records.

1 atolls3 dive sites

Conservation context

Gill-plate fisheries and bycatch; very low reproductive rate slows recovery.

IUCN · Endangered

Watch responsibly

Approach from the side, never head-on; no touching or chasing, and don't dive down onto them.

Field notes

Has the largest brain-to-body ratio of any fish.

Among the most intelligent fish, with exceptionally large brains; uplisted to Endangered in 2019 after sharp declines.

Collective noun · a squadron of rays

Profile references

References are shown transparently; profile copy may also include editorial synthesis. Seasons and sightings vary with wild conditions.

Continue exploring

More rays.

Wildlife sightings are never guaranteed; encounters vary with season, weather and animal behaviour.