Introduction
In recent years, the extraordinary biological and ecological biodiversity of Mexico has been well documented. Also, a solid scientific knowledge has been generated on the importance of the ecological services generated by the biodiversity of the natural areas throughout the country (CONABIO 1998; CONANP 2012). Simultaneously, different methodologies have been proposed in other countries that have helped to provide increasingly objective evidence for guiding conservation and ecotourism-related decisions, allowing recreational activities to be undertaken within natural areas in an orderly and systematic way that generates the least possible impact (Carr 2000; Fraschetti and others 2002; Gossling 2002; Coccossis and Mexa 2004). According to these methodologies, ecotourism requires the estimation of the tourism carrying capacity (TCC) of public use sites and the establishment of interpretive trails (underwater trails in marine ecosystems) highlighting the elements of the ecosystem for educational purposes to visitors. These trails help the visitor to attain a greater consciousness and knowledge of the environment and provide those visitors with high-quality knowledge and experiences. In marine environments, underwater trails may be designed for SCUBA divers along shallow areas of particular scenic beauty to make the local flora and fauna