Whale shark adventure!

From May 20th till September 15th Get to see and snorkel with the biggest fish in the world, the enormous but harmless whale shark! Dive into the surrounding sea of Contoy Island. This island has the most beautiful coasts of the Yucatan Peninsula.
• Snorkel the second largest coral reef in the world reef to admire the different aquatic species of the Gulf of Mexico and the Caribbean Sea.

http://www.ecocancun.com/en/tours/whale-shark-adventure.html