13+ Christmas Tree Worm Symmetry Background. Christmas tree worms (spirobranchus giganteus) are a type of polychaete, a group of segmented worms that contains over 13,000 species. Written by a student at the clausthal university of technology in the rexx scripting language, it drew a crude christmas tree as text graphics.
Its crown comes in a variety of different colors, but is always paired.
The common name for these worms is derived from their appearance. Polychaete worms may not top anyone's list of favorite sea creatures, but diving a coral reef just wouldn't be the same without christmas tree worms. The tops of christmas tree worms look like brightly colored plants. Christmas tree worms (spirobranchus giganteus ) are an abundant denizen of tropical reefs around the globe.