I also believe it may be a hybrid, but that dark color with the blue coming out and the shape of its head, make me think it has something of the common blue, yellow tail acei.
Right ! That's it ! I finally disagree...I think its an Octupus.
Bah. No. I agree...looks like a Pseudotropheus hybrid, with certainly a good hint of acei and possbly a dollop of cynotilapia afra. Nice looking little fish.
It looks alot like some fish I saw at one of my LFS's: a red top cobalt zebra. Not sure what they are exactly, be they pure or a hybrid, but the orangish looking top on the purplish/blue body resembles the four fish now in my tank that I got from there.