soldier-fish vs squirrelfish

soldier-fish and squirrelfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
soldier-fish	Yes	No	No	No
squirrelfish	Yes	No	No	No

As nouns, squirrelfish is a hypernym of soldier-fish; that is, squirrelfish is a word with a broader meaning than soldier-fish:

soldier-fish: the larger squirrelfishes
squirrelfish: very small, brightly colored (especially red) nocturnal fishes of shallow waters or tropical reefs; they make sounds like a squirrel's bark

soldier-fish (noun)	squirrelfish (noun)
the larger squirrelfishes	very small, brightly colored (especially red) nocturnal fishes of shallow waters or tropical reefs; they make sounds like a squirrel's bark
	similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States