Final answer:
Koi fish belong to a group of carp species that have been farmed and eaten in China for centuries. However, in the United States, Asian carp, which include some species of koi fish, are invasive and pose a threat to native species.
Step-by-step explanation:
Koi fish actually belong to a group of carp species and have been farmed and eaten in China for over 1000 years. They are a popular aquaculture food resource worldwide. However, in the United States, Asian carp, which include some species of koi fish, are considered invasive and pose a threat to native species.
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