barbu vs threadfin

barbu and threadfin both are nouns.

Word	Noun	Adjective	Verb	Adverb
barbu	Yes	No	No	No
threadfin	Yes	No	No	No

As nouns, threadfin is a hypernym of barbu; that is, threadfin is a word with a broader meaning than barbu:

barbu: found along western Atlantic coast
threadfin: mullet-like tropical marine fishes having pectoral fins with long threadlike rays

barbu (noun)	threadfin (noun)
found along western Atlantic coast	mullet-like tropical marine fishes having pectoral fins with long threadlike rays