zooplankton vs creature

zooplankton and creature both are nouns.

Word	Noun	Adjective	Verb	Adverb
zooplankton	Yes	No	No	No
creature	Yes	No	No	No

As nouns, creature is a hypernym of zooplankton; that is, creature is a word with a broader meaning than zooplankton:

zooplankton: animal constituent of plankton; mainly small crustaceans and fish larvae
creature: a living organism characterized by voluntary movement

Other hypernyms of zooplankton include animal, animate being, beast, brute, fauna.

zooplankton (noun)	creature (noun)
animal constituent of plankton; mainly small crustaceans and fish larvae	a living organism characterized by voluntary movement
	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else