Curlywhorl

The Curlywhorl is a non-sapient species native to the Earth-like planet Greenworld.

Biology
Like all major faunal organisms on Greenworld, they evolved from a six-limbed starfish-like ancestor with radial symmetry, which later developed bilateral symmetry secondarily. In the case of the Curlywhorls, they became very elongated creatures which live on trees. Their sensory organs are located on their backside.

Appearances

 * Natural History of an Alien, a.k.a. Anatomy of an Alien (1998)