# Manta Ray — Facts, Threats & Conservation

*Mobula birostris (giant) and Mobula alfredi (reef manta)*

> Manta rays are Endangered filter-feeding elasmobranchs — giant and reef species with wingspans up to seven metres — threatened globally by bycatch, gill-plate trade and fisheries.

**IUCN status:** Endangered  ·  **WARN range:** Tropical and subtropical oceans worldwide — coasts, reefs and open water

## Quick facts
| Fact | Value |
| --- | --- |
| IUCN status | Endangered (both species) |
| Wingspan | Up to ~7 m (giant manta) |
| Feeding | Filter-feeding on plankton |
| Species | Giant manta and reef manta |
| Reproduction | One pup every 2–5 years |
| CITES | Appendix II (since 2013) |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Chondrichthyes
- **Order:** Myliobatiformes
- **Family:** Mobulidae
- **Species:** Mobula birostris and Mobula alfredi

## Conservation status
- **Status:** Both giant and reef manta rays Endangered due to fisheries bycatch, targeted gill-plate trade and low reproductive rate.
- **Population:** Declining globally; regional counts at aggregation sites
- **Trend:** Decreasing
- **Assessed:** 2020
- **CITES:** Appendix II
- Live mantas often generate more ecotourism revenue than one-time gill-plate sale.

## Key facts: Manta Ray
- Mantas are rays, not true fish in the usual sense — cartilaginous skeletons like sharks.
- Giant and reef mantas were split as separate species after genetic studies.
- Gill plates are dried and sold in traditional medicine markets despite no proven efficacy.
- Mantas have the largest brain of any fish studied, relative to body size.
- Individual spot patterns on the belly identify animals in photo-ID catalogues.
- Reproduction is slow — one pup every two to five years limits recovery.

## Giant of the rays
Manta rays belong to Mobulidae alongside devil rays. The giant manta Mobula birostris roams oceanic waters; reef manta Mobula alfredi stays closer to coasts and cleaning stations. Both possess cephalic lobes — paddle-like fins channeling food toward the mouth.

Filter feeding resembles whale sharks: swimming open-mouthed through plankton blooms or barrel-rolling in dense krill. Unlike stingrays, mantas lack a functional venomous spine on the tail.

Brain-to-body ratios and reported curiosity toward divers fuel interest in manta cognition, though research remains limited compared with marine mammals.

## Migration, cleaning stations and tourism
Tagged mantas cross ocean basins — giants recorded travelling thousands of kilometres. Aggregations form at seamounts, reef channels and cleaning stations where smaller fish remove parasites.

Ecotourism at sites such as the Maldives, Indonesia and Mexico generates revenue when regulated. Touching mantas, excessive boats and propeller injury harm animals; many operators enforce no-contact codes.

Photo identification using belly spot patterns builds global databases linking individuals across years and sites — citizen science aids population monitoring.

## Fisheries, gill plates and bycatch
Mantas are caught as bycatch in tuna and swordfish fisheries, especially gillnets and purse seines. Direct targeting for gill plates — marketed as peng yu sai — surged in the twenty-first century until CITES listing in 2013.

Slow reproduction magnifies losses: females mature late, bear one pup at a time and gestate about a year. Population declines estimated at 30 to 50 percent over three generations triggered Endangered listing for both species.

Enforcement of trade bans, bycatch reduction technologies and protected aggregation sites are priority conservation tools.

## Manta rays and people
Indonesia and Malaysia — WARN partner regions — host major manta tourism and trade routes. Community benefit from live mantas often exceeds one-time sale value of dead animals, supporting arguments for protection.

Readers can choose operators with certification, avoid gill-plate products and support no-fishing zones at known aggregation sites. Mantas cannot survive captivity display long-term — they need vast water volumes and continuous swimming.

## Related WARN guides
Manta rays are elasmobranchs — read WARN's shark guide for wider cartilaginous fish context. Dolphin, sea turtle and whale pages cover other megafauna sharing plankton-rich seas.

Jellyfish guide notes cnidarian relatives; coral reef protection benefits ray cleaning stations.

Gill-plate trade bans and bycatch reduction protect manta populations worldwide.

## What WARN does
WARN educates readers in Indonesia and Malaysia — global centres for manta tourism and historic gill-plate trade — about sustainable oceans and anti-trafficking principles. This guide is free public education linking marine giants to habitat protection across partner countries.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Manta Ray
### Are manta rays endangered?
Yes. Both giant and reef manta rays are listed as Endangered on the IUCN Red List due to bycatch, gill-plate trade and slow reproduction.

### How big is a manta ray?
Giant mantas reach wingspans over seven metres; reef mantas typically four to five metres. Both are among the largest rays.

### Do manta rays sting?
They lack a functional venomous barb like many stingrays. The tail spine is vestigial or absent in mantas.

### What do manta rays eat?
Plankton, krill, small fish and larvae filtered through gill rakers while swimming.

### Why are manta gill plates traded?
Dried gill plates are sold in some Asian markets for traditional medicine despite no scientific evidence of health benefits.

### Where can you see manta rays?
Tropical and subtropical seas worldwide — cleaning stations in Indonesia, Maldives, Hawaii, Mexico and Mozambique among famous sites.

## Sources
- [IUCN Red List — giant manta ray](https://www.iucnredlist.org/species/198921/68631575)
- [Smithsonian Ocean — manta ray](https://ocean.si.edu/ocean-life/fish/manta-ray)
- [Encyclopaedia Britannica — manta ray](https://www.britannica.com/animal/manta-ray)
- [Wikipedia — Manta ray](https://en.wikipedia.org/wiki/Manta_ray)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/manta-ray