monkeyboy":2od7wd9o said:I agree with Matt, the list of fish you've selected grow very large (Clown triggers max out at 2 feet, half the length of this tank!), it's unlikely that the angels will get along w/ eachother, and theres a risk with the tangs getting along. If it were my tank, I'd do the black tang, emporer, and clown trigger, starting them all off young with the clown trigger going in last.
Chill,
I've often been able to keep more than one species of angel together in a tank that size. If one is considerably larger than the other the battles for domination are usually short lived. Some seem to get along together remarkably well. I love clown triggers, but they can grow into nasty critters. I have one that is so mean he lives along in 75 gallon sump and working in the sump is dangerous. I once saw a clown trigger disembowel as 6" imperator angel in a single bite. Fish keeping rules are not written in stone.
Mitch
PS
You might trying a nice large foxface or a harlequin tusk instead of multiples from the same family. I have a large tassled file in my 450 that is well behaved and always gets attention. Instead of the porcupine puffer I would recommend a Sapo or Guineafowl from Mexico. You might also consider lions and eels. A large zebra moray is a very cool fish. Don't rush it. There are great things to choose from.
M
Just wanted to add that most 120-gallon tanks are longer than 4' unless it is really deep.