, it just seems like having two yellow tangs is not a whole lot different than having one, it's very unlikely they would be aggressive to each other, and a 2" fish does not exactly obstruct the swimming area of another 2" fish. now, if 4 feet is not enough length for this species of tang, that's another story, but I don't quite understand how, if the tank is big enough for 1, it's not big enough for 2. Given we assume water and food quality.
On the contrary it's easy to see how if the tank is big enough for 1, it may not big enough for 5, as an example. Unless we were talking about a semi aggressive species, then in fact having 5 may be more beneficial than having 2 (possibly spreading the aggression out amongst the lot.)
anybody care to shed some light on this for me? Thoughts, experiences? hard evidence?