We just recently went on a Western Caribbean Cruise on the Enchanted Princess. The fourth port was Costa Maya. We chose to do the Dolphin Swim Adventure. The cost was $124.95 and we did book it through the cruise line. The total time from gathering to getting lockers and actually interacting with the dolphins was around 1 1/2 hours. Truly a great excursion. There was also an opportunity to buy the photo package which was $140 but included over 50 digital pictures.