Lisbon Oceanarium displays the world's largest nature aquarium, inspired by the work of Takashi Amano, a well-known landscape photographer and expert in freshwater aquariums. With his knowledge of Japanese gardening techniques and the wabi-sabi philosophy (Japanese philosophy based on imperfection), Amano transformed the world of planted aquariums, creating what is now called nature aquariums. The exhibit includes a U-shaped aquarium, decorated with 12 tonnes of sand, 25 tonnes of volcanic rock, and 78 tree trunks. This immersive setting is home to over 10,000 tropical freshwater fish from 40 different species and 46 aquatic plants.