white sturgeon vs Pacific sturgeon

white sturgeon and Pacific sturgeon both are nouns.

Word	Noun	Adjective	Verb	Adverb
white sturgeon	Yes	No	No	No
Pacific sturgeon	Yes	No	No	No

As nouns, white sturgeon and Pacific sturgeon are synonyms defined as:

white sturgeon and Pacific sturgeon: food and game fish of marine and fresh waters of northwestern coast of North America

Other synonyms of white sturgeon include Acipenser transmontanus, Sacramento sturgeon.

white sturgeon (noun)	Pacific sturgeon (noun)
food and game fish of marine and fresh waters of northwestern coast of North America	food and game fish of marine and fresh waters of northwestern coast of North America
valuable source of caviar and isinglass; found in Black and Caspian seas