I cut out 8 curvy, pointed tentacles from black and purple satin.  Sewed them together and lightly stuffed with poly fill.  I then sewed the wide end to the bottom of a long sleeved lavender tee shirt.  I took a slinky knit shirt and roused it a couple of inches in the front so it would look like it was shaped like a corset top.  The skirt hung long enough to cover the bottom of the tee shirt where the tentacles  were sewn to the top.  I used fishing line and attached it to several of the tentacles and then tied the other end to rings that also had sea shells attached.  Whenever I moved my hands the tentacles would move up and down. The necklace was also hand made by drilling holes into the shells and stringing them on fish line.