scubaseason

Oceanic Manta Ray

Mobula birostris

Sighting evidence at Whale Shark Corridor, Kalpitiya

Oceanic Manta Ray

Photo: Programa Marino del Golfo de California · CC BY-NC

Oceanic manta rays appear alongside whale sharks at the corridor's plankton aggregations from January to March, making slow barrel rolls through the densest zooplankton patches to maximise filter-feeding efficiency. Their wingspan can exceed 5 m and their cephalic fins — which funnel water into the gill plates — are fully unfurled during active feeding passes, creating a spectacular sight. These are wide-ranging pelagic animals; the Kalpitiya sightings likely represent individuals traveling a broader Indian Ocean circuit that includes Maldivian and Mozambican feeding grounds.

Evidence at this site

No confirmed records on file at this site

Oceanic Manta Ray is listed as a curated species here based on historical reports.

How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Also seen at other sites