In this exciting adventure we swim with the largest fish in the world - the whale shark! Of course, you may be asking yourself: is it a whale or is it a shark? Hint: whales are mammals and sharks are fish. And at up to 59 feet and 15 tons, whale sharks are definitely a whale of a shark! And while your mother probably told you to stay away from sharks, these gentle giants are only interested in plankton – all human flesh is safe! These gentle giants feed on plankton in the Bay of La Paz (so all human flesh is safe), and it is here that we have the remarkable experience of observing and swimming with them.