Amur Bay (Russian: Амурский Залив, Amurskiy Zaliv) is a major bay within Peter the Great Gulf of the Sea of Japan. The bay has an approximate length of 65 kilometres (40 miles), width of 10 kilometres (6.2 miles) to 20 kilometres (12 miles), and a depth of 20 metres (66 feet). It is part of the larger bay formed with Ussuri Bay to which it is connected by the Eastern Bosphorus, and separated by the Muravyov-Amursky Peninsula and Eugénie Archipelago. The Amba River, Razdolnaya River, Narva River, and Barabashevka River all flow into Amur Bay.