|Whale shark Cancun, Mexico|
The video is from the Cancun Whale Shark Tours company which operates whale shark adventures from mid May to mid September. They note on their website that this tour is great for people of all ages noting that they had one 88-year-'young' grandmother do the tour twice.
The video was uploaded by Mario Chow on Vimeo and is 9:39 in length.
Photo is screenshot from video.