dollarfish vs stromateid fish

dollarfish and stromateid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
dollarfish	Yes	No	No	No
stromateid fish	Yes	No	No	No

As nouns, stromateid fish is a hypernym of dollarfish; that is, stromateid fish is a word with a broader meaning than dollarfish:

dollarfish: small food fish of Atlantic coast
stromateid fish: small marine fish with a short compressed body and feeble spines

Other hypernyms of dollarfish include butterfish, stromateid.

dollarfish (noun)	stromateid fish (noun)
small food fish of Atlantic coast	small marine fish with a short compressed body and feeble spines
any of several silvery marine fishes with very flat bodies