[untamed]

Originally Posted by GreenSpottedPuffer

Fish school in my tank! LOL

But they have to avoid being eaten by my 10" grouper (He has eaten a few in the past month)

I think your right on about why most fish don't school in aquariums. I had some chromis before the grouper and they used to fight constantly. After adding the grouper, the chromis have stopped fighting and school along with the damsels and coral beauty. They really stick together now in a very strange looking group! No more aggression once the predator was added.

I would really like to see a photo of what the "school" looks like in your situation. I have a nice predator in my tank as well and I'm very curious to see the effect it has. I can't believe that your grouper has only eaten a few in a month. I'm concerned my Lookdown would polish off an entire school in a couple of days!