Please I.D. this fish

[stang90gt]

this is my first fish in my aquarium, not sure what it is, but the LFS said it wouldn't get too big about 6" i dont know but i would really appreciate it if someone could tell me what it is. sorry about the poor quality but it was taken with my cell.
thanks in advance

 

[Dmoney1]

uro aka mayan cichlid ..will get about 10"-12" for a male

 

[stang90gt]

wow, ummm i hope it will be ok in my aquarium. i only have a 56 column tank.

 

[stang90gt]

thank you Dmoney1 for your help

 

[Chago09]

gallons don't really help, tank dimensions is more important. 56 column tank I am assuming is a tall tank so can't be longer then 30". I would for sure take it back. This fish will be way to big in no time and will kill everything you have in there, then will eventually die off as well. Your tank would be great for some dwarf cichlids and some tall plants.