Snorkel alongside docile whale sharks during this eco-adventure on Isla Holbox. With your local guides, board a boat and set off in search of these gentle giants, keeping a lookout for other species like giant manta rays and sea turtles as you cruise. Slip into the water in pairs with a knowledgeable guide and swim with the world's largest fish, which can grow up to 45 feet (14 meters) long. On the way back to shore, stop near Cabo Catoche to snorkel the 'cuevones' reef. Continue to Santa Paula to go swimming and enjoy freshly caught ceviche before returning to Holbox. Use of all equipment, breakfast and snacks are included.