nekton vs being

nekton and being both are nouns.

Word	Noun	Adjective	Verb	Adverb
nekton	Yes	No	No	No
being	Yes	No	No	No

As nouns, being is a hypernym of nekton; that is, being is a word with a broader meaning than nekton:

nekton: the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales
being: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of nekton include organism.

nekton (noun)	being (noun)
the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales	a living thing that has (or can develop) the ability to act or function independently
	the state or fact of existing