I might not be the best to post about this experience wise, as I've had my pair of "designer" clownfish for just under 72 hours. They're in a 29 gallon with a six line wrasse and a fire fish (purple), and that is what people were telling me the max would be as far as fish go. So I personally have 4 fish, 3 shrimp, 2 crabs, a dwindling number of hermits, and an assortment of snails.
Here's the thread I started about stocking if you're interested
http://www.reefcentral.com/forums/showthread.php?t=2516507
My clowns are very young and were intimidated by the fire fish at first, but are starting to settle in now (and my fire fish is seeming to be the exception, not the rule, as usually they become shy and reclusive when a more dominate fish is introduced)
One good thing about Finding Nemo is that tank raised clownfish are easy to find. They seem to be less aggressive, but also less prone to choose anemones so if that's important to you it's something to consider. I think that'd be something to look at if aggression is a factor.
In theory, most of them are no different from 'normal' clowns. Many of them are the same species anyways (either perc or occy), just different colors and patterns. So really unless clown aggression is somehow tied to coloration and patterns, they'd be no more or less average than their 'normal' counterparts, on average.
If it's worth anything, my tank-bred mochas haven't taken up residence in their nem yet - going on 4 months now that the nem has been right on top of their nesting cave. But she will swim across the tank to roll around in my frogspawn for a minute before coming back home![]()
What type of anemone?
RBTA, 4+ inches in diameter.