Reef manta ray

Mobula alfredi

Wing-like fins carry the reef manta through coastal waters, while paired head fins guide food toward its mouth. Around Sangalaki, tracking research connects this large ray with East Kalimantan’s reef seascape.

Vulnerable

Species details & taxonomy

Species: Mobula alfredi
Genus: Mobula
Family: Mobulidae
Order: Myliobatiformes
Class: Chondrichthyes

Recognition

The broad disc is formed by enlarged pectoral fins. Beside the forward-facing mouth, the head fins can be rolled or extended, changing the outline while the manta swims. Patterns of spots on the underside allow researchers to recognize individuals across repeated encounters. That makes photographs of the belly valuable for understanding movements and repeated use of particular reefs, rather than simply recording an attractive silhouette.

Sources & references · 1

Species account or primary research · Peel et al. (2024), reef manta feeding and cleaning behaviour in Seychelles

Habitat and Borneo range

Reef mantas use feeding areas and cleaning sites. Satellite-tracked animals at Sangalaki document the species in the Berau seascape of East Kalimantan. A cleaning site is a place where small cleaner animals service the ray’s body, often around a prominent reef structure. Feeding and cleaning fulfil different needs, so a manta’s habitat is a network of useful places rather than a single resting point.

Sources & references · 3

Fisheries 2025 10(2):66 · Staying Close to Home: Horizontal Movements of Satellite-Tracked Reef Manta Rays Species account or primary research · Manta Trust: mobulid behavioural ecology Species account or primary research · Peel et al. (2024), reef manta feeding and cleaning behaviour in Seychelles

Food and ecological role

The head fins unfurl to channel plankton-rich water into the mouth. Food is filtered as water passes through the gill apparatus, making this large ray a consumer of tiny organisms. Feeding opportunities depend on where plankton accumulates. Studies of reef mantas show that feeding and cleaning can form repeated routines, connecting changing food patches with sites that animals revisit.

Sources & references · 2

Species account or primary research · Manta Trust: mobulid behavioural ecology Species account or primary research · Peel et al. (2024), reef manta feeding and cleaning behaviour in Seychelles

Reproduction

Courtship can take the form of males following a female in a swimming train. Fertilization is internal, and the mother gives birth to a live pup rather than laying an egg case on the reef. Cleaning sites can also be settings for courtship, linking reproductive behaviour with other repeated reef visits.

Sources & references · 2

Species account or primary research · Manta Trust: mobulid behavioural ecology Species account or primary research · Courtship and mating behaviour of manta rays

Where to look

A recorded occurrence does not guarantee a sighting or visitor access. Read the area and experience guides for habitat, responsible observation, guiding and current access before choosing a trip. Keep wildlife at a distance and follow local restrictions.