Dule Fansa

The Dule Fansa is a an creature that appears in the Animorph Series.

Physiology
It is a large, purple creature possessing a face where its chest should be located. With big eyes and a mouth full of sharp teeth, and four muscular arms that end in sharp, red points, capable of launching at its enemies. The points are connected by accordian-like skin that can retract the points so they may be reused again.

Source

 * Animorphs #20 The Discovery