The Bight of Bonny and the Bight of Benin are part of the coastline of this gulf, which counts Sao Tomé and Principe among its Cameroon Line of volcanic islands and is the gulf into which the Niger River flows.
This body of water is the endpoint of a river that empties into it in a delta also known as the Oil Rivers. One country that shares its name with this body of water owns the two Elobeys, Corisco, Annobón, and Bioko, five islands located within it. The Bight of Bonny and the Bight of Benin are part of the coastline of this gulf, which counts Sao Tomé and Principe among its Cameroon Line of volcanic islands and is the gulf into which the Niger River flows. This gulf contains the intersection between the prime meridian and the equator. For 10 points, name this gulf on Africa's west coast that shares its name with a country that also contains "Bissau" in its name.
This body of water is the endpoint of a river that empties into it in a delta also known as the Oil Rivers.
Gulf of Guinea [accept Equatorial Guinea; accept Guinea-Bissau at the end]