^^ touched on THE point of how lfs
' can keep certain fish packed into small tanks: the fish are meant to sell within 2 weeks max time or their cost is considered a loss. There usually isn't enough room for an actual territory, but just enough room to share diseases lol
will never have a fish longer than 3 weeks unless it is constantly moved behind the scenes for whatever reason.
Surgeonfish do not belong in small tanks under 120g because they are constantly on the move and usually stake a larger territory than your average reef fish. Small tanks tend to make them more territorial, more jittery, and more likely to run into decor when they attain larger sizes.