Vallarta is very popular as one of the best places in the world to view humpback whales in their natural habitat. From November to March, humpback whales migrate to the warm waters of Banderas Bay. Several guided tours leave every morning to take visitors to see and learn about these huge mammals. The growing number of whale-watchers has created concern in recent years over the effect the numerous boats may have on the behavior of this mammals. In response to this concern, local eco-tour operators and federal authorities have established new regulations for any tour operator providing whale watching services. For centuries Humpback whales have been migrating to Banderas Bay to breed and instruct their young. You can help in the conservation of these mammals by hiring the services of responsible tour operators that follow these guidelines.