The cardinal tetra is one of the most popular pet fish in the world. They look like little red and blue sequins. You've almost certainly seen them at the pet store or the fish tank at your dentist's office. They're everywhere. Not so long ago, most of the world's supply of cardinals came from just one place. It's a little town deep in the rainforests of Brazil, where locals still catch these fish by hand. But the business that this town has relied on for decades has come under threat. Recently, we hopped on a plane to see this unusual economy for ourselves — and, two different visions for how to save it. For more information about these fish, check out Project Piaba. Pre-order the Planet Money book and get a free gift. / Subscribe to Planet Money+ Listen free: Apple Podcasts, Spotify, the NPR app or anywhere you get podcasts. Facebook / Instagram / TikTok / Our weekly Newsletter. This episode was hosted by Jeff Guo. It was co-reported and produced by Luis Gallo. It was edited by Marianne McCune, fact-checked by Sierra Juarez and engineered by Kwesi Lee. Alex Goldmark is Planet Money ’s executive producer. To manage podcast ad preferences, review the links below: See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy