White Christmas Tree Worm

The fringe of a white Christmas tree worm.
Flickr user Laszlo Ilyes

The festive Christmas tree worm (Spirobranchus giganteus) lives on tropical coral reefs and resembles a fluffy fir tree adorned with ornaments. The multi-functional branch-like appendages are used by the worm to breathe and to catch meals of plankton floating by. See more holiday-themed animals!