Sciaena aquila vs sciaenid

Sciaena aquila and sciaenid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sciaena aquila	Yes	No	No	No
sciaenid	Yes	No	No	No

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

Sciaena aquila: large European marine food fish
sciaenid: widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound

Other hypernyms of Sciaena aquila include sciaenid fish.

Sciaena aquila (noun)	sciaenid (noun)
large European marine food fish	widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound