Platypus

A platypus was a peaceful creature that resided in Zarrak's mountain. It had the bill of a duck and the shell of a turtle. Zarrak, a user of dark magics was able to transform this creature into a much larger and fearsome form using his powers. He did this to show his apprentice, Teebo how to transform creatures into aggressive animals. However, when Teebo attempted to transform the beast, he accidentally transformed stranglevines instead, and the platypus swam away.

Behind the scenes
This creatures is not named in The First Apprentice, but it resembles the real-world platypus in appearance.