toadfish vs spiny-finned fish

toadfish and spiny-finned fish both are nouns.

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

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

toadfish: bottom-dwelling fish having scaleless slimy skin and a broad thick head with a wide mouth
spiny-finned fish: a teleost fish with fins that are supported by sharp inflexible rays

Other hypernyms of toadfish include acanthopterygian.

toadfish (noun)	spiny-finned fish (noun)
bottom-dwelling fish having scaleless slimy skin and a broad thick head with a wide mouth	a teleost fish with fins that are supported by sharp inflexible rays