The world’s largest whale shark and manta aggregation in Mexico’s Caribbean

Experience the world’s largest known aggregation of whale sharks and manta rays feeding in the clear, warm waters just 30–45 minutes from Isla Mujeres, off the northeastern tip of Mexico’s Yucatán Peninsula. This extraordinary encounter offers the chance to snorkel alongside the world’s largest fish and, if conditions allow, the world’s largest ray, while contributing to a global citizen science effort advancing our understanding of migratory routes, residency, and population sizes.

Picture a swirling tapestry of open-mouthed, white-spotted whale sharks and graceful, jet-black manta rays moving through turquoise waters. You will be guided by Dr. Rachel Graham, Founder and Executive Director of MarAlliance, a globally recognized expert who has spent more than 20 years leading pioneering research on whale sharks and manta rays. She was the first person in the Western Hemisphere to complete a PhD on whale sharks and has published extensively on both species, while also helping to shape responsible tourism practices in countries including Mexico.

Through her guidance, you will gain firsthand insight into the behavior, ecology, and conservation of these remarkable animals while actively supporting ongoing research.

This snorkeling-only experience is suitable for adults and for children aged 14 and older when accompanied by an adult.