The size of a school bus but in many ways a mystery, whale sharks continue to fascinate. Join a team of international scientists at a renowned marine sanctuary in Cabo Pulmo, Mexico and discover how we’re trying to better understand these remarkable creatures. #OurBluePlanet is a digital project between BBC Earth and Alucia Productions. Come join the conversation over on Twitter @OurBluePlanet This film was produced by Alucia Productions You can watch more of their films here vimeo.com/aluciaproductions Alucia Productions website: aluciaproductions.com/ Expedition Team: Dr. Mauricio Hoyos: Managing Director, Pelagios Kakunja Dr. James T. Ketchum: University of California, Davis, Graduate Student Researcher. Director of Conservation, Pelagios Kakunja Andrea Asunsolo: Reseacher, Pelagios Kakunja Dr. Simon Thorrold: Woods Hole Oceanographic Institution, Senior Scientist - Biology Manuel Castro: Local fisherman Production Crew: Director: David Hamlin Director of Photography: Earl “Kip” Evans Field Audio/2nd Camera: Rick Smith Production Manager: Audrey Costadina Editor: Ryan Quinn Post Supervisor: Brian Golding Executive Producer: Jennifer Hile Creative Director: Mark Dalio Subscribe to the BBC Earth YouTube channel: www.youtube.com/subscription_center?add_user=BBCEarth Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: tinyurl.com/YouTube-BBCEarth-FanPanel BBC Earth Facebook www.facebook.com/bbcearth BBC Earth Twitter www.twitter.com/bbcearth BBC Earth Instagram www.instagram.com/bbcearth/?hl=en Visit www.bbc.com/earth/world for all the latest animal news and wildlife videos This is a channel from BBC Worldwide who help fund new BBC programmes.