Enjoy the thrill of this close encounter with the largest and most majestic fish in the ocean, the whale shark. Each year, between the months of June and September, whale sharks migrate to the warm, plankton rich waters off the coast of the Yucatan Peninsula. Despite their name, their enormous size and appearance, they are docile creatures and consume only plankton. The largest fish on the planet, they grow to an average length of 12m/40ft or more!