There are actually two:
West of the northern part of Italy is the Ligurian Sea, bounded by the island of Corsica and northern Italy.
West of the southern part of Italy is the Tyrrhenian Sea, bounded by the islands of Sicily and Sardinia and the southern half of the Italian Peninsula.
The Adriatic Sea is located to the East of the Italian peninsula
The Italian Peninsula.
The peninsula is a little to the east of the "center" of the sea.
The Adriatic Sea.
The Tyrrhenian Sea
An island of southern Italy in the Mediterranean Sea west of the southern end of the Italian peninsula.
The Italian Peninsula is located in Southern Europe. Bodies of water, as part of the greater Mediterranean itself, include the Aegean Sea.
Mediterranean sea
The Red Sea borders the Arabian Peninsula to the west.
Weddell
The Italian Peninsula is bordered by the Mediterranean Sea on the south, the Adriatic Sea on the east, the Tyrhennian Sea on the Southwest and the Ligurian Sea on the Northwest.
They were located by the Aegean Sea or the Sea of Italy to the west and east of the Greek peninsula. (basically Mediterranean sea)