Pros- cool fish
Cons- Box fish, Naso
Details-
The Huma will be the most aggressive fish by far. Not likely to eat the others so long as they're similar size but will out feed them. Followed by the puffer, slow but powerful. Generally a fairly ok fish unless it decides to eat something. The...
Your eel wil eat anything that will fit in its mouth, so forget shrimp,etc. Your butterfly will eat most polyp type corals and maybe so others too. You could try a condulactus anenome. It might eat your clowns but, then again it might not.
They don't live too long in tanks. 6 months would be considered a long life. they are filter feeder and to meet their dietary requirements in a tank is very difficult unless you have a very large tank and are OCD about keeping it suplemented with small microorganisms for them to feed on...