I also think it is a Nephthes sp Craig, it doesn't look right for a Capnella sp
For those interested in soft cora ID books
Soft Corals and Sea Fans; A Comprehensive Guide to the Shallow-Water Genera of the Central-West Pacific, the India Ocean and Red Sea by K. Fabricius & P. Aldreslade.
Then there is the free PDF book I posted on RAG long ago