I wouldl ove to take a snorkeling tour in a catamaran or sail boat, so I can get to see more fishes/sea turtles etc. HOWEVER, my dear husband has a bit of open water phobia.
When you go to these excursions, do you snorkel in areas where your feet cannot touch the ground? I think that was his limiting factor.
Have you gone with ppl who are afraid of open water? how do they react?