That is a great T. Macrostoma! I've been looking for them for years and I can never find them. Hopefully in the near future there will be some more of them around.
What is Old World. I talked to a guy where I bought my 180 gal. tank from and he told me to stay away from them. he said that they are REALLY MEAN and will kill just about everything so I told him to order me some Fuscotainiatus's instead. I mean ther doesn't seem to be much of a difference other than size and temperment.
Old World Exotic is an importer/fish farm in S. Florida. They are probably the largest importer of Malawi/Tangayikan fish in the country. They arent mean at all, by the way. T. nigriventer is, this species is not.