need ID

[nikesb]

purchased as a digitata. ive had for 6 months now and it has yet to encrust the base. not sure its a digitata at all anymore

 

[gon08]

With the polyps lined up they way they are, I would say it's Seriatopora caliendrum.

 

[dudley moray]

looks more like S. hystrix
s. caliendrum isn't known to be purple

 

[nikesb]

definately not a hystrix

here it is beside a hystrix

 

[dudley moray]

S. guttatus