What does Placida dendritica eat?

Dear Yi Zhang,
The first thing we need to establish is which Placida dendritica you are interested in? 'Typical' Placida dendritica was first described from Europe, and on the Forum we have a page for animals from both sides of the Atlantic. There are also pages for animals from southeastern Australia and the tropical Pacific, which have also been identified as P. dendritica. If you have a look at the messages on those pages you will see that there are scientists at the moment studying whether all the animals around the world which have been called P. denditica are in fact one species or a group of very similar-looking but quite distinct species. 'Typical' P. denditica from the British Isles feeds on Codium tomentosum and Bryopsis plumosa.
Best wishes,
Bill Rudman