I'm afraid that I must respectfully disagree with kentobismol's statement regarding keeping only two bichirs in a 75 gallon tank. You could easily house four of the 'smaller' species of bichir in a 75 gallon tank (Polypterus senegalus, Polypterus palmas subspecies, Polypterus delhezi, Polypterus retropinnis) along with a few other fish.
-Joe
-Joe

