Meaning of “creature” - Learner’s Dictionary

creature

noun [ C ] us uk /ˈkriːtʃər/
marine creaturesSharks are fearsome creatures.For such creatures speed is not important.These are some of the most spectacular creatures on earth.It's tragic to think that these marvellous creatures are dying out.

B1 anything that lives but is not a plant:

Dolphins are intelligent creatures.

(Definition of “creature” from the Cambridge Learner’s Dictionary © Cambridge University Press)