social feather dusters
... that groups of social feather dusters sway in unison in the water current and retract into their tubes at the slightest disturbance?
... that groups of <b id="mwAw4"><a href="./Bispira_brunnea" id="mwAw8" rel="mw:WikiLink" title="Bispira brunnea">social feather dusters</a></b> sway in unison in the water current and retract into their tubes at the slightest disturbance?