The humpback whale is listed in Appendix I of CMS and is one of the focal species in marine conservation initiatives of the government of Costa Rica. Currently the country is recognized individuals of two populations of American Pacific. One from the northern hemisphere (Oregon-California) and the other from the southern hemisphere (Antarctic Peninsula). This species is one of the most important for the activity of whale watching in the country as it generates about $ 5 million and in some communities about U.S. $ 1 million per year to pay their tickets. The impact of this activity in coastal rural communities is important. Therefore, this project aims at working with young people and guide of communities to identify critical areas, behavior, distribution, photo-identification of humpback whales, as well as interactions with tour boats in Osa, in the Pacific southern Costa Rica. The ecological data will be collected in two ways. 1) Through collaboration participatory community members participating, where after training the technical staff of Keto, surveys will held in tourist boats. 2) also undertake surveys in the study area, where they look for humpback whales during the months of study. During each encounter the next information is recorded: date, time start and end, geographical position at the beginning and end of the sighting, engine type and horsepower of the vessel, sea state (Beaufort scale and swell scale), initial and final behavior of the group (traveling, resting, socializing, etc.), group size (minimum, best estimate, maximum), spatial organization (tight, scattered, spread widely, mixed), approximate area occupied by the group,% of observed group (on which are made observations of behavior), presence and number of calf and juveniles. Besides photographs will be taken during the encounters in order to identify individuals by the color pattern and markings present on the ventral surface of their fluke. Finally, we recorded the number of vessels and types of vessels (Tourism, Fisheries, Other) present during the sighting, and the reaction of individuals (positive, neutral, negative) to the type of approach by boats. Once data has been analyzed and elaborated in the project final technical report, discussions were held where data obtained in this initiative will be presented to the tourism guides and captains in the communities of Drake, Sierpe and Uvita from Osa Canton. This will allow sharing of information generated and reinforce the measures stipulated in the regulation of whale watching (Decree No. 32495-MINAE-MOPT-MSP-MAG). Later meetings were held to share the information generated with the relevant authorities within the Conservation Area and the national representatives involved in international conventions such as the International Convention for the Regulation of Whaling and the Convention on the Conservation Migratory Species.