What type of Tilapia is this ?

[Abdullah Al-Zaidan]

Hello  am New to this  and was searching for some information regarding a species of juvenile  tilapia i found  rearing in tertiary treated sewage water in the wild and was wondering about its type i have narrowed  it down to either Nile or Blue tilapia. Your help is appreciated and hope this information is beneficial   20151001_112806.JPG

any good books on Tilapia species identification ?? 

[Pam DeLong]

Looks like the Blues I have.

[Abdullah Al-Zaidan]

Thank you Pam