fish vs shrimp

fish and shrimp both are nouns.

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

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

Other hyponyms of fish include crab, seine, scallop, scollop, rail, brail, angle, net fish, shark, trawl, still-fish, prawn.

fish (noun)	shrimp (noun)
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills	small slender-bodied chiefly marine decapod crustaceans with a long tail and single pair of pincers; many species are edible
the flesh of fish used as food	any of various edible decapod crustaceans
	disparaging terms for small people

fish (verb)	shrimp (verb)
catch or try to catch fish or shellfish	fish for shrimp
seek indirectly