sailor's-choice vs sparid fish

sailor's-choice and sparid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
sailor's-choice	Yes	No	No	No
sparid fish	Yes	No	No	No

As nouns, sparid fish is a hypernym of sailor's-choice; that is, sparid fish is a word with a broader meaning than sailor's-choice:

sailor's-choice: similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States
sparid fish: spiny-finned food fishes of warm waters having well-developed teeth

Other hypernyms of sailor's-choice include sparid.

sailor's-choice (noun)	sparid fish (noun)
a grunt found from Florida to Brazil and Gulf of Mexico	spiny-finned food fishes of warm waters having well-developed teeth
similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States