"A shark and a seal."
Translation:Un rechin și o focă.
Different from English, in Romanian the nouns have genders: masculine, feminine, and neuter. We find the gender by counting the noun:
MASCULINE: UN rechin - DOI rechini --- (one shark - two sharks)
FEMININE: O focă - DOUĂ foci --- (one seal - two seals)
NEUTER: UN avion - DOUĂ avioane --- (one plane - two planes)
"un" is the indefinite article for masculine and neuter nouns.
"o" is the indefinite article for feminine nouns.