With nutrient-rich waters welling up from the Tonga Trench offshore and being carried by strong currents funneling through narrow passages, Fiji is famous for some of the world's most colorful soft corals.
All the islands have excellent scuba diving and snorkeling, and all but a few of the resorts either have their own dive operations or can easily make arrangements with a local company. Many dive operators will take snorkelers along; that's my favorite way to go snorkeling in Fiji.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.