How many zebra danios should be kept together?

At least five zebra danios should be kept together. Zebra danios are schooling fish, and they seek comfort and safety in groups. If you keep fewer than five zebra danios in a tank, they might become stressed, lose their appetite, become ill, or even show aggression towards other tank inhabitants.

Make sure that the tank doesn’t get overcrowded. As a general rule, each zebra danio requires two gallons of space in the tank. A small school of five danios needs a 10-gallon tank or larger to thrive.

If you’re keeping them in a community tank, don’t forget to consider the other tank inhabitants as well.