pipefish vs teleostan

pipefish and teleostan both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipefish	Yes	No	No	No
teleostan	Yes	No	No	No

As nouns, teleostan is a hypernym of pipefish; that is, teleostan is a word with a broader meaning than pipefish:

pipefish: fish with long tubular snout and slim body covered with bony plates
teleostan: a bony fish of the subclass Teleostei

Other hypernyms of pipefish include teleost, teleost fish.

pipefish (noun)	teleostan (noun)
fish with long tubular snout and slim body covered with bony plates	a bony fish of the subclass Teleostei