Clavularia viridis is a species of colonial soft coral in the family Clavulariidae.

The polyps grow from basal stolons which form a purple mat encrusting the substrate.

They are retractable and fluorescent green, usually with a band of white or yellow around the margin of the oral disc.

It also spreads its tentacles to catch zooplankton floating past, and can extract organic matter from the sea water.

Reproduction takes place in November when all the colonies in the area liberate gametes into the sea between 22 and 24 days after the full moon.