the purpose of schooling is that smaller fish in large groups can give of the presentation of a much larger fish to their predators, throwing the predators off, and If the predator attacks, it decreases the chance of it getting a hold of a small fish (all the same looking targets making it hard to target an individual)
So, in essance, what real schooling fish do is act very similiar, mimicing movements instantaneously etc. oftren times facing the same way, swimming very tightly, they turn together, move together, staying in essentially the same order etc.
Granted, loose schooling fish (like most schoolers in FW
) don't hold to this quite as much, but they do a decent and impressive job none the less. Larger schooling fish look cool, my silver dollars do it to a small extent....possibly because they can end up as food though....