Sardina pilchardus vs clupeid

Sardina pilchardus and clupeid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sardina pilchardus	Yes	No	No	No
clupeid	Yes	No	No	No

As nouns, clupeid is a hypernym of Sardina pilchardus; that is, clupeid is a word with a broader meaning than Sardina pilchardus:

Sardina pilchardus: small fishes found in great schools along coasts of Europe; smaller and rounder than herring
clupeid: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

Other hypernyms of Sardina pilchardus include clupeid fish.

Sardina pilchardus (noun)	clupeid (noun)
small fishes found in great schools along coasts of Europe; smaller and rounder than herring	any of numerous soft-finned schooling food fishes of shallow waters of northern seas