barracuda vs spiny-finned fish

barracuda and spiny-finned fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
barracuda	Yes	No	No	No
spiny-finned fish	Yes	No	No	No

As nouns, spiny-finned fish is a hypernym of barracuda; that is, spiny-finned fish is a word with a broader meaning than barracuda:

barracuda: any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth
spiny-finned fish: a teleost fish with fins that are supported by sharp inflexible rays

Other hypernyms of barracuda include acanthopterygian.

barracuda (noun)	spiny-finned fish (noun)
any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth	a teleost fish with fins that are supported by sharp inflexible rays