Here is a short video of my guild taking down a Whale Shark in Vashj'ir!
We knew pre-Cata that this achievement was first on our to-do list. Was a lot of fun! We gathered on The Intrepid, then flew out to sea. A hunter engaged and kited the shark the entire time while the raid burned it down as fast as they could.
Be sure to watch this video at highest quality.
Just for fun. Cheers!