Help with ID of fish, PICS, PICS

Hi All,

My Other half came home with these fish the other day but cant remember what the shop called them, I have attached photos so any help would be great, :feedback:

Thanks,

Cheers Paddy, I have had a look and i think you may be right,

Thanks for the correct name SubRosa,

I went back to the shop at the weekend, (Abyss Aquatics, Stockport). In there they were called Blue Humphead Cichlid's. I have three and all three look like different species now, One is really dark like Purple with stripes, the other changes from stripes to spots and is fairly light, the last has perm spots and is really light (like Silver). im thinking they are just fighting to be the boss of the tank. Is this normal for these type of fish, Its a big tank in comparison to the fish but they seem quite aggressive. Any thought will be very welcome,