What level of classification groups the zebrafish with closely related Asian minnows?
Answer
Genus *Danio*.
The Genus level, designated as *Danio*, serves to group the zebrafish with a select, small number of minnow species that are highly similar to it. Characteristics used to define a genus are far more specific than those used for a family or order, frequently involving subtle shared skeletal features or reproductive strategies. The Family Cyprinidae is much broader, including common carp, and Order Cypriniformes groups it with all carps and minnows. Class Actinopterygii is an even higher grouping based on fin structure.
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