I know there is info in google about it.. but I wish I could get answers from experienced folks here. I'm planning to get one for my spare 4x2x2 tank, I already talk to a hobbyist that sells 4 varities of this wolves, namely mala, red, black and aimara. I told him I'll give him a call on the 30th on what I would take. I know to be on the safe side I must keep it on solitude. So I would like to know the difference between these two species and which is much enjoyable to keep, because I can only keep one. Aimara is my first choice but it's out of my budget range as of the moment but I will get that in 2 months time since I already reserve for a slot next shipment. So I'm stuck with the common wolf and the black wolf as my choice. Hoping I can get inputs here before I can make a decision. Thanks in advance! HFK! 
