angler vs spiny-finned fish

angler and spiny-finned fish both are nouns.

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

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

angler: fishes having large mouths with a wormlike filament attached for luring prey
spiny-finned fish: a teleost fish with fins that are supported by sharp inflexible rays

Other hypernyms of angler include acanthopterygian.

angler (noun)	spiny-finned fish (noun)
fishes having large mouths with a wormlike filament attached for luring prey	a teleost fish with fins that are supported by sharp inflexible rays
a fisherman who uses a hook and line
a scheming person; someone who schemes to gain an advantage