Looks to me like a Nicaraguense Cichlid, I've a 4" female, the male loses the stripe as he matures but the female retains hers. Do you own it? If so, has it started to colour up yet (blue head, red/orange body)? The females are just as colourful as the males.
wow i have a very simmilar fish if not identical. i also have know idea what it is lol. i do know that i has a very distinct light blue to it where the gils are kind of small reflective spots