Which gulf in the arch of Italy's boot lies between Calabria and Apulia?

The Gulf of Taranto lies in the arch of Italy's boot between Calabria and Apulia.

It is a broad gulf of the Ionian Sea in southern Italy, named after the city of Taranto on its northern shore. Although the question highlights Calabria and Apulia, the gulf also reaches the Italian region of Basilicata, which occupies part of the western and northern coast.

The gulf is nearly square, measuring about 140 kilometres from side to side, and is regarded as Italy's largest gulf. Its boundaries are commonly marked by Cape Colonna in Calabria to the west and Santa Maria di Leuca in Apulia to the east. Rivers including the Basento, Sinni and Agri drain into it.

The region has deep links to Magna Graecia, the Greek-colonized part of ancient southern Italy. Greek settlements around the gulf included Kroton, Heraclea, Thurii and Sybaris. It is often confused with the Gulf of Naples or Gulf of Genoa, but those are farther north and lie in different parts of Italy's coastline.