Pleurosaurus is one of the few known aquatic sphenodontians. Its body was approximately  long, and elongated for hydrodynamic streamlining, with comparatively short limbs and a powerful tail.
Pleurosaurus is an aquatic reptile that belongs to the group of sphenodontians. It had a slender, elongated body, roughly , which was streamlined for swimming, accompanied by relatively short legs and a strong tail.