Hitch hiker Coral

[sandersc]

Hi can anyone ID this for me. It came attached to the base of a leather coral.
I think it may be one or other porytes, but ont know.

Thanks

 

[sandersc]

Here's 2 more

 

[SaltyBoy]

Goniopora Planulata

 

[sandersc]

Goniopora Planulata

It does look like a goniopora, but it seems a bit small for a Goniopora Planulata.
Perhaps The stutchburyi goniopora?