Cirriformia tentaculata

David Kipling Apart from the greenish siphon to the right of Ascidia conchilega the rest of this picture is a mystery to me. Are these individual orange worms of some type? And what makes the tiny sand-covered tube with arms waving out shown in the blow-up?

Andrew Mackie Orange 'worms' look like gills to me. Maybe from a cirratulid such as Cirriformia tentaculata .

David Kipling Ah, I see now, so all from one animal. Thanks

David Kipling What about tiny waving arms?

Andrew Mackie The cirratulid gills could be from a Cirratulus. Wonder if the thin 'tubes' are faecal extrusions from a sabellariid?