Freaking huge, since the smallest lungfish species, the gilled African lungfish, gets about 2 feet long. Minimum 8 feet by 3 feet by 2feet high (360 gallons) It only goes up from there
Very cool fish, I want an African spotted Lungfish myself eventually. All carnivores, NOT a fish to hand feed, they are very capable of taking fingers off. Long lived too, Shedd Aquarium in Chicago has an Australian lungfish that's been there since 1933 and was adult when they got him. A pet that you will need to will to your grand kids.
MFK's Lungfish forum:
http://www.monsterfishkeepers.com/forums ...
like 150 gal
Lungfish feed on snails and plants, storing quantities of fat for sustenance during hibernation.
