Stanley Pool

Pool Malebo
Satellite image of the Pool Malebo; the capital cities of Brazzaville, ROC and Kinshasa, DRC are indicated.
Coordinates	4°16′55″S 15°29′19″E / 4.28194°S 15.48861°E / -4.28194; 15.48861Coordinates: 4°16′55″S 15°29′19″E / 4.28194°S 15.48861°E / -4.28194; 15.48861
Lake type	Fluvial
Primary inflows	Congo River
Primary outflows	Congo River
Surface elevation	900 ft (270 m)
Islands	Mbamu
Settlements	Kinshasa, Brazzaville

The Pool Malebo,formerly Stanley Pool, also known as Lake Nkunda by local indigenous people in pre-colonial times, is a lake-like widening in the lower reaches of the Congo River. The former name Stanley Pool was named after early European explorer and journalist Henry Morton Stanley.

The Pool Malebo is about 35 km (22 mi) long, 23 km (14 mi) wide and 500 km² in surface area. Its central part is occupied by M'Bamou or Bamu Island (180 km²), which is Republic of the Congo territory. The pool is shallow with depths of 3–10 m, while water levels vary by as much as 3 m over the course of a year at an average altitude of 272 m (900 ft).

The capitals of the Democratic Republic of the Congo and the Republic of the Congo—Kinshasa and Brazzaville, respectively—are located on opposite shores of Pool Malebo. These are the two closest capital cities in the world (other than Rome, Italy and Vatican City, which are actually contiguous).

The Pool is the beginning of the navigable part of the Congo River upstream to the cities of Mbandaka, Kisangani and Bangui. Downstream, the river descends hundreds of meters in a series of rapids known as the Livingstone Falls to reach sea level at the port of Boma after a trajectory of 300 km.

There are many palm and papyrus swamps along the edges of the river and pool, and often movement of floating mats of Eichhornia plants.

Most fish endemic to the area are catfishes, including the mountain catfish, L. brieni, Leptoglanis mandevillei, L. bouilloni and Atopochilus chabanaudi, an upside-down catfish. The area has over 200 fish species documented, with Mormyrids as the most common with over 40 species, and with the highest diversification.