Hanifaru Bay, Baa Atoll: Manta Aggregations in the Maldives

Hanifaru Bay lies within a protected marine zone on the eastern edge of the Baa Atoll, a small and shallow, dead-end reef inlet that translates in the local Dhivehi language as 'Hani' (narrow) 'faru' (reef). Its unique geological structure, a sandy bottom surrounded by a shallow reef along almost its entire perimeter, serves as a crucial aggregation site for a truly remarkable phenomenon.

This specific corner of the Indian Ocean is globally recognised as one of the premier locations to encounter reef manta rays (Mobula alfredi) in vast numbers. These aggregations are primarily feeding events, drawn by the abundant plankton funnelled into the bay by the prevailing currents during specific times of the year. It's not uncommon to witness what's known as 'cyclone feeding,' a mesmerising display where mantas form a spiralling vortex, sifting plankton from the water column.

During these feeding frenzies, the sheer volume of mantas can be astounding, with records indicating up to 247 individuals observed within a single event. Over the past 15 years, the Maldivian Manta Ray Project has identified more than 1,800 distinct individuals at this site through photographic identification, underscoring its immense importance to the species. While the focus is undeniably on the mantas, you might also have the extraordinary chance to spot whale sharks (Rhincodon typus) joining the feast.

The conditions that permit such a gathering are dependent on the southwest monsoon, locally known as Hulhangu, which typically runs from May to the end of November. During this period, strong lunar currents create upwellings that concentrate plankton within the bay, attracting the filter feeders in their hundreds. Being within a UNESCO Biosphere Reserve, strict regulations are in place to ensure minimal disturbance to these incredible animals, ensuring their continued presence and the integrity of this fragile ecosystem.