sailor's-choice vs sailors choice

sailor's-choice and sailors choice both are nouns.

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

As nouns, sailor's-choice and sailors choice are synonyms defined as:

sailor's-choice and sailors choice: a grunt found from Florida to Brazil and Gulf of Mexico

Other synonyms of sailor's-choice include Haemulon parra.

sailor's-choice (noun)	sailors choice (noun)
a grunt found from Florida to Brazil and Gulf of Mexico	a grunt found from Florida to Brazil and Gulf of Mexico
similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States