Original: It has a mean breadth of about 160 km ( 85 nm , 100 mi ) , although the Strait of Otranto , through which it connects at the south with the Ionian Sea , is only 45-55 nautical miles wide ( 85-100 km ) .
Simplified: The Strait of Otranto joins the Adriatic Sea and the Ionian Sea and is only 85 to 100 km wide .