The little pet fish that saved a town in the Amazon

亚马逊河上那条拯救了一座小镇的小宠物鱼

Planet Money

2026-03-18

33 分钟
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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
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  • This is Planet Money from NPR.

  • A couple weeks ago Planet Money producer Luis Gallo and I found ourselves on a dark, glassy river in the middle of the Amazon rainforest.

  • We climbed into a small canoe.

  • After settling in a bit, we headed upriver.

  • And we're off.

  • We were here to investigate a change that's been happening in the worldwide multi-billion-dollar business of pretty little fish.

  • You know, those tropical fish you often see at the pet store, the neon-colored ones, the ones at Shimmer Lake Sequins?

  • Some of them actually come from the wild.

  • In fact, one of the world's most popular species of pet fish is caught right here in the Brazilian Amazon.

  • Our guide for the day is Valdiriz Cicada.

  • People call him Deco.

  • Deco says get ready for an aventura, an adventure, to see what we can catch.

  • Will you ask Deco just to tell us a little bit more about where we're going?

  • Our producer Luis, who speaks Portuguese, actually he speaks a lot of languages, was interpreting.

  • He's saying that we're going upriver to get a better sense of where the fish live, because they live in shallow water.

  • The river that we're on is called the Rio Negro, the Black River.

  • It's one of the main tributaries of the Amazon.

  • And for several months out of the year, the river level rises and floods the surrounding rainforests, creating this dense tropical swamp.

  • It's like we're in the middle of a forest, but the ground is water.

  • Totally flooded.