I just recently bought two bichirs from Toyin - an endlicheri and a P. bichir bichir. Both are in the 13-15" range... Added them to my 330g and they've been fighting quite a bit. The bichir bichir, slightly larger of the two, is doing a lot of snapping and clamping on the endli's fins and tail... I'm well-versed when it comes to aggression between cichlids, dats, etc... But not with bichirs. So I'm not sure how serious to take the fighting that's going on at this point. If anyone here has experience and can offer advice, I'd appreciate it. I'm obviously hoping to hear that this is normal and that they should work out their differences in time. The tank is certainly large enough and there are a few very large pieces of driftwood to offer hiding spots.