Acropora nana or valida?

[PasserAngelfish]

Is it acropora nana or valida?
the seller said it is nana but i don't think so because i've nana that is different.

 

[PasserAngelfish]

1 more

 

[aqua80]

acropora nana
see this post : http://www.reefcentral.com/forums/showthread.php?t=1997526

 

[PasserAngelfish]

acropora nana
see this post : http://www.reefcentral.com/forums/showthread.php?t=1997526

thank you. i think it should be nana.