mulloway vs sciaenid fish

mulloway and sciaenid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
mulloway	Yes	No	No	No
sciaenid fish	Yes	No	No	No

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

mulloway: large important food fish of Australia; almost indistinguishable from the maigre
sciaenid fish: widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound

Other hypernyms of mulloway include sciaenid.

mulloway (noun)	sciaenid fish (noun)
large important food fish of Australia; almost indistinguishable from the maigre	widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound