What is the taxonomic family for Danio rerio within the order Cypriniformes?
Answer
Danionidae
*Danio rerio* is classified taxonomically within the family Danionidae. This family belongs to the order Cypriniformes, which is notable for representing the most species-rich group across all vertebrates, specifically within the teleosts (bony fishes). The subfamily Danioninae, which contains the zebrafish, showcases remarkable evolutionary diversity, including relatives that exhibit extreme miniaturization, contrasting sharply with the modest size of *D. rerio* itself.

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