Most agressive fish you can put in a 90g?

[tennisace]

What are a few of the most aggressive fish you can put in a 90g? I'm not going to mix them, I want to consider a few and then only have a species only tank possibly.

 

[exile415]

undulated trigger. should be by himself. will attack and eventually KILL other tankmates

 

[batman1820]

queen triggers are pretty narly too

 

[cincyreefer]

Damsels.

 

[haze123]

lol

 

[lion_crazz]

I would do the undulated in a tank all by himself because they are a time bomb waiting to happen. The reason I recommend the undulated over the queen is because you will not find a queen small enough.