I will assume creatures means animals.
Six letter animals:
six letters long
Smurfs is six letters long.
toward
alpacabeaverbobcatcougardonkeyferretgibbonmonkeypoodlerabbit
JehovahAnswer:Both Lord Vishnu and Lord Brahma have six letters in their names and were creator deities.
minute
walnut
Author
Carats.
Pigeon
Dozens
racoon