That does make sense, I'm trying to find one that I don't like at this point. I watched a member on here's video, the ultimate bichir care guide. After the first time I watched it I wanted all UJ's, then I watched it again and all the LJ's. DecisionsLook at it another way. Buy what you like. If your leaning towards lower jaws or vice versa you may just end up rehoming a bunch of fish.