The Gulf of Yotu is an arm of the Crimson Ocean in south-eastern Invinni. It is about 1400 miles long and about 1200 miles wide at its broadest. The city of Kyne sits at its northernmost extremity, where the River Yotu empties into it. The provinces of Vonei, Senei, Iron Gates, Polatia and Yolbein border. It is one of the busiest tracts of water in the world.