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Welcome to Stuff to Blow Your Mind, a production of IHeart Radio.

Hey, welcome to Stuff to Blow Your Mind. My name is Robert Lamb.

And I'm Joe McCormick, and we're back with the third and I think for now final episode in our series about fishes of gold,

where we've been talking about orange, yellow, and golden varieties of fish in the carp family, like the goldfish and the coy fish.

In the past two episodes, we talked about the selective breeding of goldfish, which goes back more than a thousand years in China and was historically linked to the practices of Chinese royalty.

We also talked about how even though the orange and golden colors of goldfish today are mostly the result of artificial selection by humans. There are some interesting evolutionary

reasons that animals sometimes develop similar colors in nature, and we talked about what those

reasons are. We also discussed adaptations in goldfish and close relatives like the Crussian

carp to the adaptations that make them able to survive extremely low oxygen

...