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Following your aquarium fish back to its home in the Amazon

NPR | By Jeff Guo
Published July 17, 2026 at 2:42 PM MDT

We trace the origins of the popular aquarium fish the cardinal tetra back to the Amazon to see how even the most remote corners of the world are transformed by the global economy.

Copyright 2026 NPR
Jeff Guo
Jeff Guo (he/him) is a co-host and reporter for Planet Money, NPR's award-winning podcast that finds creative, entertaining ways to make sense of the complicated forces that move our economy. He joined the team in 2022.