Stylaster nobilis, the noble coral, is a branching colonial hydroid in the family Stylasteridae.

[1] Noble corals are pink or orange and tree-like with paler tips to the colony's branches.

The polyps project from star-shaped cavities in the rigid calcareous skeleton.

Growth occurs at the tips and on the outside surface, which gradually thickens and which may show concentric rings in section.

They occur in cool temperate waters usually in caves and under overhangs.