White sand, turquoise blue water, and swaying coconut trees: Zanzibar archipelago, just off the African coast, is a tropical paradise. Its coastline, although overcrowded in some areas, offers good snorkeling, both from the beach and on the surrounding islets. Multicolored starfish, clownfish, butterflyfish, moray eels, and surgeonfish are particularly easy to spot in the island’s shallow waters.