Sup guise. I'm about to get a 55 gal tank and I've been agonizing over what to put in it. I've settled on: dwarf lionfish, engineer goby, and maroon clownfish (one of each). Is this a fuckstupid idea? Or would these three work in a tank together?
they should be fine, they're all usually pretty aggressive.
that's not a lot of fish for a 55 though. And once you put those in you'll have a hard time adding more fish unless you're getting something pretty mean that will break up territories.
I've kept a lot of aggressive and predator tanks. You just need to keep fish that are too big to fit in anyone else's mouth, and try to avoid fish that prey on other fish. Other than that the sky's the limit.
I've found coral beauties and puffers to be particularly capable of defending themselves. Clown wrasses and harlequin tuskfish are tough as well. Triggers vary, they're all fairly aggressive and some will kill everything in the tank. Snowflake eels are usually good choices. Damsels will usually work as well. Blue devils and yellow-tailed blues in particular are very scrappy.
but really it's up to you. A lot of fish are pretty aggressive without eating their tankmates.
This is subjective but the most agressive fish I've had were non predatory but highly agressive tangs. But I not keeps say puffers and sharks in reef type tanks only becuase they make it difficult to keep a cleanup crew while trying to support them.
I've kept them with lions, undulated triggers, puffers, large wrasses. Only thing that ever snacked on them was a particularly large puffer.
oh, and a giant Caribbean hermit crab I had for a while. Those fuckers kill fish like nothing else. Also beware the green serpent star.