Vacationers watch gray whales approaching their boat in Ojo de Liebre Bay, in Baja California Sur Peninsula, northwest Mexico, on April 12, 2016. According to data from the National Commission of Protected Natural Areas (CONANP, for its acronym in Spanish) of Mexico, in 2015 more than 15,000 tourists attended presence of the sighting of the gray whales and the number is expected to exeed this year. [Photo/Xinhua]