SOSTANTIVI per principianti

Use of the verb "to have" plurals

Are these the nostrils?
No, these are not
the nostrils.
These are
the eyes.

the dorsal fin

the caudal fin

the pectoral fin

the pelvic fin.

the anal fin.

A fish has several fins:
the pectoral fin; the dorsal fin; the anal fin; the pelvic fin and the caudal fin.