Feather boa seaweed. The fringe and balls are edible. (The balls are "sea olives" for their shape and salty-savoriness.)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/38559542@N02">Leslie Seaton</a> from Seattle, WA, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/lacatholique/6118563035/">Feather Boa</a>