Here we go again.
Does not matter at all. You Iranins only have one big lake (Caspian Sea) and the swallow Gulf.
While the Arab world literary has a coastline that is 50.000 km long from the Atlantic Ocean in the West, half of the Mediterranean Sea, ARABIAN SEA, GULF OF OMAN (that borders your country too), Indian Ocean, the beautiful Red Sea etc. KSA alone has a longer coastline than Iran and that is just one Arab country.
The Arabs living next to the Gulf (Southern Iraq, Kuwait, coastal regions of the Eastern Province in KSA, UAE, Qatar, Bahrain and Northern Oman) call those swallow waters for the Gulf or the Arabian Gulf. And I am even sure that the Arabs living in Iran also call if the Gulf or Arabian Gulf.
But let us just call it the persian Gulf if that makes them happy. After all they don't have much access to sea compared to the Arab world.
One Island, speaking about the Gulf LOL, in Saudi Arabia, Tarout Island has a history of 7000 years. We already had that debate yesterday when I, other users and a Chinese users debunked the nonsense presented.
Tarout Island - Wikipedia, the free encyclopedia
Stick to the news.