Delonovolva Aequalis / Muricea californica
Simnia on California Golden Gorgonian

A rose-colored Simnia forages across a Golden Gorgonian.

These small snails have smooth shells,
over which they spread their beautiful, multi-colored mantle.

The gorgonia upon which Simnia live and feed
consist of a colony of individual polyps which build a skeleton
made of calcium, into which they can
withdraw for protection -- as those near the Simnia have done.  The
polyps on the far right are still extended.