In Belize to film a documentary about lionfish, Paul Cater Deaton and Monica Gephart find a country embracing sustainable ecotourism, and dazzling pastiche of wildlife on land and at sea. In the jungles and rainforests, they encounter crocodiles, birds and howler monkeys. Exploring an ancient Mayan site deep within a cave, they discover the remains of human sacrifices, including the legendary “Crystal Maiden.” On the second-largest barrier reef in the world, they meet even more wild creatures, from the invasive lionfish, to the largest, most deadly jellyfish in the Caribbean.