He has read a great deal about seacreatures and spent a lot of time wading around at low tide.
Times, Sunday Times (2006)
A walker gets a monster surprise - a gruesome seacreature curled up on the sand.
The Sun (2011)
Definition of 'creature'
creature
(kriːtʃəʳ)Explore 'creature' in the dictionary
countable noun
You can refer to any living thing that is not a plant as a creature, especially when it is of an unknown or unfamiliar kind. People also refer to imaginary animals and beings as creatures.