What Plant Is This?

I've never had live plants before so I decided to get some while I was at Petco. I don't usually go there but they had the fish I wanted. Anyway the lady failed to mention what kind of plant this is. If I could get some information on it that'd be great! The pictures are of the same kind of plant.
 
Thanks all. x
 

It looks like Hygrophila corymbosa -  Blue stricta
 

Thanks so much!