Photo: Fair-Trade Pets? Eco-Fish Touted to Save Amazon Enclave

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Cardinal tetra fish show off the primary-color finery that helps make them popular among aquarium owners.

The pets have traditionally been caught the old-fashioned way, by fishers in canoes along Brazil's Rio Negro. A new cardinal tetra farm in Florida, though, may threaten the fish's home in the Amazon Basin—and the communities that live there.

Photograph by Max Gibbs/Getty Images

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