Tropical Snorkeling

While snorkeling in the tropics you’ll marvel at the clear blue shimmering waters, colorful marine life and silvery schools of fish, maybe even a dolphin or two—all under a sparkling sun. No wonder the tropics are favored for Tropical Snorkeling.
The beaches are shallow, less than a hundred fathoms (1 fathom = 6 feet or 1.8 [...]

Source: http://www.cruisevacations4U.com/cruise-travel-tips/tropical-snorkeling