Original: The platforms and elevators are guarded by creatures confusingly known as Zubs but each planet has a different sub-species - for example the first level's Zub resembles a gyroscope whilst he fourth level's is a fish.
Simplified: The platforms and elevators are guarded by creatures (also known as Zubs) but each planet has a different sub-species - for example the first level's Zub resembles a gyroscope whilst he fourth level Zub is a fish.