The whale shark, Rhincodon typus, is a slow-moving filter feeding shark, the largest living fish species. The largest confirmed individual was 12.65 metres (41.50 ft) in length. Although whale sharks have very large mouths, they feed mainly, though not exclusively, on plankton, microscopic plants and animals.
From some years ago, whale sharks stay very close and around the La Paz Bay. They are friendly and they are great animals to watch and swim with. Many people visit La Paz to be able to swim and snorkle side by side of this impressive animal. You can rent a tour on a boat in La Paz and get close to them and let them come close to you or swim with them. It is a great experience. Last year, in 2010, they stayed all year long very close to the bay. Previously, the whale sharks would swim in winter to warmer waters. If you wish, you can also kayak around them and leave from the bay and do this tour in a day.