Which gulf is also known as the Arabian Gulf?

Arabian gulf is not correct. It has always been and still is “The Persian Gulf “.

It is historically known as the Persian Gulf. The oldest maps of the region say so. Unfortunately, using fake names for this gulf is a way to widen the gap between Iranians and Arabs.

Historically, however, these were the Arabs themselves who started calling it Al-Khāleej-al-Fârs, i.e., the Persian Gulf, because 1- it is to the "Persian" side of the Arabian Peninsula, and 2- it was Persia—one of the then superpowers—that held complete and unopposed sway over it (at least, until the late Sassanid era).