chinook salmon vs chinook salmon

chinook salmon and chinook salmon both are nouns.

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

chinook salmon (noun)	chinook salmon (noun)
large Pacific salmon valued as food; adults die after spawning	large Pacific salmon valued as food; adults die after spawning
pink or white flesh of large Pacific salmon	pink or white flesh of large Pacific salmon