umbee? black arowana or jardini?
Royal or a regular clown knife. <---if he sees any of these in person i think he would change his tune on ugliness.
payara.
or rays
He should probably give that 800 gallon tank to somebody who appreciates fish, then. Why in the world would someone who isn't into the cool fish set up an 800 gallon tank?! That would be like me building a modernized and well-equipped ten car garage and filling it with...Ford Pintos and Dodge trucks. Waste of space. Makes me sad and a little angry to hear about it, actually. Here I am doing everything in my power to maintain an interesting collection on pennies and scraps and there's a baller out there who wants an 800 gallon tank full of worthless fish. Maybe you should steer him toward plastic fish and remote-controlled submarines instead.