is this purple valida ?

[chercm]

pls help to identify

 

[reefionary]

it doesnt look like it though. but that is a damn nice colony,

 

[stanlalee]

looks very much like a valida to me. purple nana also simular.

 

[scrapz]

looks more like a nana to me

 

[aquainas]

Acropora nana it looks like.

 

[dvanacker]

how can you tell the difference between nana and valida??

 

[staceyd72]

A. valida - axial corallites are small; radial corallites are strongly appressed and swollen, and have small openings.
A. nana - axial corallites are tubular with rounded margins; radial corallites are long, tubular, and appressed.

I would conjecture that Chercm's coral is A. nana and a beauty at that.

how can you tell the difference between nana and valida??