zooplankton vs fauna

zooplankton and fauna both are nouns.

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

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

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

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

zooplankton (noun)	fauna (noun)
animal constituent of plankton; mainly small crustaceans and fish larvae	a living organism characterized by voluntary movement
	all the animal life in a particular region or period