Project Piaba (pronounced: [pi:ˈɑ:bɑ:]) is a fishery initiative located on the Rio Negro tributary of the Amazon river. The program both promotes and researches sustainable aquarium pet fish collection and its impact on the environment. The name of the project comes from the Brazilian Portuguese word, piaba, which means "little fish", referring specifically to the cardinal tetra (Paracheirodon axelrodi). Project Piaba is an ongoing project with annual research expeditions to the Rio Negro region. Because of the sustainable nature of the project, its slogan is "Buy a Fish, Save a Tree!"