garfish vs ganoid fish

garfish and ganoid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
garfish	Yes	No	No	No
ganoid fish	Yes	No	No	No

As nouns, ganoid fish is a hypernym of garfish; that is, ganoid fish is a word with a broader meaning than garfish:

garfish: primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth
ganoid fish: primitive fishes having thick bony scales with a shiny covering

Other hypernyms of garfish include ganoid.

garfish (noun)	ganoid fish (noun)
primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth	primitive fishes having thick bony scales with a shiny covering