We were a group of 4 adults ages 52 - 67 on a snorkelling tour of Hol Chan Marine Reserve and Shark Ray Alley. We used Nano Guerrero, Tour Guide, for our outing. He has a glass bottom boat which allowed us to view fish and other sea creatures as we cruised along in the water. Awesome!
Nano was informative and charismatic, making sure we had a splendid snorkelling adventure. This was by far the best one I ever had. The snorkelling equipment seemed new and was very clean. Nano made sure we were wearing the masks appropriately for optimum viewing.
I would definately recommend doing this tour. We saw hundreds of fish, many sharks, sting rays, and even a few turtles. Whenever I go back to San Pedro, this tour is definately a must for me to do again.