Arabian Sea

Correct!
Mumbai is located on the West Coast of India.
Bounded by India, the Arabian Sea is a region of the Indian Ocean.

From Mumbai, it's time to sail off to Sydney, Australia!
Sydney is located 51.64 degrees South and 215.55 degrees East of the Arabian Sea.

Question:
The Sydney Terminal is located in the Pacific Ocean, but what Sea region is it in?

Tasman Sea
Baltic Sea
North Sea