Obbusen
This deep bay lies between the large estuaries of the Ob (Gulf of Ob) and the Yenisei River. The peninsula formed between this bay and neighbouring Yuratski Bay is known as the Mamonta Peninsula (; "Poluostrov Mamonta", meaning 'Mammoth Peninsula') and the narrow peninsula in the NW formed between this bay and the neighbouring Gulf of Ob is known as the Yavay Peninsula (; "Poluostrov Yavay").