Atlantic salmon vs Atlantic salmon

Atlantic salmon and Atlantic salmon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Atlantic salmon	Yes	No	No	No
Atlantic salmon	Yes	No	No	No

Atlantic salmon (noun)	Atlantic salmon (noun)
found in northern coastal Atlantic waters or tributaries; adults do not die after spawning	found in northern coastal Atlantic waters or tributaries; adults do not die after spawning
fatty pink flesh of fish from northern coastal Atlantic; usually marketed fresh	fatty pink flesh of fish from northern coastal Atlantic; usually marketed fresh