Sian Ka’an is a sanctuary of various different species of mammals, exotic plants and marine life. The terrestrial animals which inhabit the Reserve can range from jaguars in the southern portion of the Reserve, to countless species of birdlife. The lagoons are the home of manatees, caymans, and various types of pink flamingos and storks. The oceans are home to turtles, rays, tropical fish and even whale sharks.

Within the Sian Ka’an Reserve there are 103 known mammal species and 336 known bird species. Only 1% of the reserve is privately owned guaranteeing that this special land remains pristine and protected.