08-27-2012, 08:07 AM
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Originally Posted by jaysee
Joining this party late, I just want to comment on the numbers thing. Yes, keeping a larger school CAN help to keep aggression confined, but it can ALSO mean more fish to terrorize tank mates. IME it really depends on the species, and even the specific specimens. It's always best to keep as large a school as possible, but it should should not be a foregone conclusion that just because there are 12 that there won't be problems - I think that's the impression people sometimes get.
Yeah, in my case the dozen Serpaes really spread themselves out and didn't really show much of shoaling behaviour at all. Basically there were about 4-5 that showed extremely aggressive territorial behaviour, and one would chase the other out of his own territory and into another's, at which point another territorial battle would ensue, and the loser would stumble into the territory of yet another... I honestly can't imagine them all suddenly deciding to get along had I came and added another handful into the mix.
Basically, observing the tank became an extremely nerve-wracking experience and I was really on edge for the whole time!