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haha yeah I know how big they get I have a tank ready....55 gallon for him and him alone...will fit him for his entire life...grows to about a foot, maybe a bit smaller...recommended space is a 40 gallon...they are not a real "active" species in terms of needing swim space, anyways...any ideas? shark aquarium has them I think...
I have done much reaserch on these fish do to the fact i REALLY want 1 but i don't have the space at the moment. As Mgamer said they will eat everything. You should keep them in a species tank as they make it were they can not eat each other. When they swallow there prey they use the force of the fish when it is trying to get away to get it farther in its mouth. When they try to eat each other they will fill up with air like a puffer fish and stay completely calm so the other gulper catfish can use that essential ability to get the fish further in his mouth. (hope that made since).
Personally i want a couple but i do not have the space.