No, there are currently no wild lions on the islands of Zanzibar. While the archipelago—specifically Unguja (the main island)—once had its own unique subspecies known as the Zanzibar Leopard, even those are now widely considered extinct or extremely rare. Lions are not native to the islands and have not inhabited them in recorded history. If you are looking for a "Lion encounter" while staying in Zanzibar, you must take a short flight or ferry back to mainland Tanzania, which is home to approximately 60% of the world's remaining wild lion population. Popular destinations for day-trip safaris from Zanzibar include Nyerere National Park (Selous) and Mikumi National Park, where you can see large prides in their natural habitat. Many tour operators in Stone Town offer "Fly-In Safaris" that allow you to leave the island in the morning, see lions on the mainland, and return by sunset. While Zanzibar offers incredible white-sand beaches and historic spice tours, the "Big Five" experience requires a quick jump across the water to the African Great Rift Valley.