Oceanic Manta Ray (Mobula birostris) - Marine Life - Liveaboard Diving

Oceanic Manta Ray

Giant/Oceanic Manta Rays (Mobula biostris) is a very special species to encounter when scuba diving. They are large, intelligent, curious, friendly & harmless. They can grow up to 7 or more metres from wing tip to wing tip, but are normally 5-6 metres across. They are larger than Reef Manta Rays, which are a different species in the same genus (Manta). The Oceanic Manta has fewer spots on its underside and there is more contrast in the coloration on its back. The Reef Manta Ray (Mobula alfredi) has less defined colouration on its back, usually in the shape of a Y or V. The Giant Manta's back is more of a T shape, and more defined. 

Oceanic Manta Ray Mobula birostris
Scientific Rank
Kingdom:Animalia
Phylum:Chordata (Chordates)
Class:Chondrichthyes: Cartilaginous fish
Order:Myliobatiformes (Rays)
Family:Mobulidae (Mobulidae)
Genus:Manta (Manta)
Species:Mobula birostris
Size
Average Size:6 metres

Manta Rays are sure to make any dive very special if you're lucky enough to encounter one. They are harmless to humans, inquisitive, playful and extremely intelligent. They have the largest brain to body size ratio of any fish. If you're ever lucky enough to see a Manta Ray while diving, do not approach or try to follow it. With its huge wing-like pectoral fins, it can swim much faster than you can, and it will just lead you out into the open. Then it will most likely turn around and visit your dive buddy or group. Divers should just remain at a safe depth and together. The ray will often come back to say hello again.

If some experts notice that one or more of the images on this page are of Reef Manta Rays, please contact us or comment. Our website is constantly being updated.

No Troubles Just Bubbles divers who recently spotted Oceanic Manta Ray

(5) - No Troubles Just Bubbles divers have spotted Oceanic Manta Ray on a liveaboard trip

Matt Johnstob
Spotted in: Thailand Thailand
Liveaboard: MV Blue Dolphin
Destinations: Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock
When: Feb 2026
Toni
Spotted in: Indonesia Indonesia
Liveaboard: Seven Seas
Destinations: Komodo
When: May 2025
Joao Paulo
Spotted in: Thailand Thailand
Liveaboard: MV Koon9
Destinations: Koh Tachai, Richelieu Rock
When: Feb 2025
Brian
Spotted in: Thailand Thailand
Liveaboard: MV Dolphin Queen
Destinations: Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock
When: Feb 2024
Stéphanie
Spotted in: Maldives Maldives
Destinations: North Male Atoll, South Male Atoll, Ari Atoll, Rasdhoo Atoll, Vaavu Atoll
When: Dec 2022

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