A school??

Isn't school more a behavior than a number? As long as there are two neon tetras in a tank, they will form a school, because that is behavior that protects them against predators in nature.
:)
 
Well, you've got a point there, schooling is a behavior, but numbers do matter. Two neons in a tank will not show much in the way of schooling behavior, there just have to be more fish. Now, if you've got two goldfish, a much more sociable fish, they will exhibit more "schooling" tendencies.

Anyway, in a tank, without a natural predator, you're more unlikely to see true schooling. I have a 55g with almost 90 cardinals, and while there is a mass of color and movement, it is not schooling. It is just a lot of fish in a small tank.

Val
 
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