beginner wants a monster

[SandNukka15]

Shoal of Caribe piranhas

 

[EcastL]

My red devil is crazy. He attacks the algie magnet. The Oscars I got are not as crazy as the red devil. But the Oscar's are crazy to watch eat. Alot of personality in both types of fish.

An oscar would be a great choice, they grow fast and have great personality. Mine would bump the glass lids when I was near the tank begging for food.

 

[joshua752]

Oscar's are cool but not a killer I would you want a red devil trimac or flowrrhorn for that rage aggressive type of fish.

 

[SandNukka15]

Don't do an Oscar. ...they are so overated and make a huge mess

 

[ehh]

what about a wolf fish. or a gulper cat?

 

[Frank Castle]

Jaguars. nuff said.

 

[Drx6x]

redfin pickerel aquarium could do a couple in a tank that size. no need for a heater and its not a fish that everyone and there mothers have.

 

[Achilles1763]

Fahaka puffer fish, always fascinating and impresses everyone.

Failing that, like previously mentioned, jaguar cichlid. Big angry brute that attacks the glass.

 

[hart24601]

Another vote for fahaka. It has personality, likes to watch you, gets ~18" so pretty much largest fish that is ok in a 120. And it's a straight up murder machine capable of biting fish larger than it clean in half.

Downside is expensive to feed and can be tricky finding appropriate food that it will eat.

 

[Fat Homer]

A fahaka will take a little more dedication... Going to need to scape the whole tank, lots of frozen seafood, keep water really clean, de-worming etc..

Not to mention, a 120 really is the absolute bare minimum, a 180 would be better...