Coral or sponge? Cretaceous

[Woodgrainstone]

I spotted an interesting fossil within a rudist reef of edwards group limestone near ozona, Texas Cretaceous Albian. This outcrop appears to be dolomitized

 

Left of the chapstick cap.

 

Thanks, George

[Hapchazzard]

Appearance-wise, I'm leaning towards colonial coral. A glance at the Palaeobiology database also turns up plenty of scleractinian occurrences from the formation, while not giving any results for sponges. Taking that into account, I'd personally say coral. Take that with a grain of salt, however -  rudists almost completely displaced colonial corals from the shallow seas by this time, so it seems pretty unusual to find a colonial from rocks of that age.

[abyssunder]

Looks like a colonial scleractinian coral, to me.

 

[Woodgrainstone]

Thank you Hapchazzard and Abyssunder