This beautiful tunicate sheds its gametes to the sea, and fertilization is external. Two solitary corals, Balanophyllia elegans sit adjacent to it. Depth 14 m.
In this underwater photo of Cnemidocarpa finmarkiensis near Northwest Island by Kirt Onthank (Feb 2006), the siphons are open and partly extended. The animal above is the sea cucumber Psolus chitonoides