Bottomfeeder;2730246; said:Siamese Barred Catfish
http://www.planetcatfish.com/catelog/species.php?species_id=708
nolapete;2730125; said:Isn't a monster fish in a 30 gallon tank an oxymoron? You can put any juvenile monster fish in a 30, but not for very long.
Laosy Fish;2732670; said:depends if your talking monster in size or attitude. so not really... look at Exodons. They will back piranha's into a corner. maybe small (max 3.5") but definitely monster in attitude... you can have about (10) in a 30g, but only that species. they will murder any other fish.