dwarf pipefish vs needlefish

dwarf pipefish and needlefish both are nouns.

Word	Noun	Adjective	Verb	Adverb
dwarf pipefish	Yes	No	No	No
needlefish	Yes	No	No	No

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

dwarf pipefish: small (4 inches) fish found off the Florida Gulf Coast
needlefish: fish with long tubular snout and slim body covered with bony plates

Other hypernyms of dwarf pipefish include pipefish.

dwarf pipefish (noun)	needlefish (noun)
small (4 inches) fish found off the Florida Gulf Coast	fish with long tubular snout and slim body covered with bony plates
	elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters