What species is this?(PICS)

[Bluespot22]

I recently got a dendro fragand it has only opened at night. I will try some cyclopeeze later. What species is this dendro? Someone told me it was a balanophyllia.Thanks in advance.

Closed:

 

[dendro982]

Interesting pieces, your collection will be very good!
Sorry, have no knowledge of them.

 

[chineseknife]

Maybe even D. arbuscula.