No. 9 This is a problematic fossil from EDIACARA. Also these traces do not show any Medusae marks, though it may look like it.  But the marks are certainly of some biogen origin due to the ringstructures which may be a form of growth structures.

This piece is from Flinters Range, Australia, where also the famous Ediacara fossils were found. They are thought to have been attached to the bottom even though they were some sort of animal. These marks may show where the creatures were attached. The rings may indicate some sort of growth structures.