fish vs panfish

fish and panfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
fish	Yes	No	Yes	No
panfish	Yes	No	No	No

As nouns, panfish is a hyponym of fish; that is, panfish is a word with a more specific, narrower meaning than fish:

fish: the flesh of fish used as food
panfish: any of numerous small food fishes; especially those caught with hook and line and not available on the market

fish (noun)	panfish (noun)
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills	any of numerous small food fishes; especially those caught with hook and line and not available on the market
the flesh of fish used as food

fish (verb)	panfish (verb)
catch or try to catch fish or shellfish
seek indirectly