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Cornish jack
The Cornish jack, ''Mormyrops anguilloides'', is a species of weakly electric fish in the family Mormyridae, native to quiet waters in much of Sub-Saharan Africa. The largest species in its family, the Cornish jack is a nocturnal group hunter of smaller fishes, using electricity to locate its prey and communicate with other members of its group. It is a commercial game fish valued for its size and taste.
The common name "Cornish jack" likely originated from European settlers, who thought that this fish resembled the European pike, whose young is known as a "jack" in some parts of England. It is also known as "African carp", a name that is used for several other species.〔
==Distribution and habitat==
The Cornish jack occurs in the White Nile, the Lake Albert drainage basin, inland waters from Senegal to Chad, rivers in Cameroon, and small coastal basins in the Guinean zone. It is also widespread in the Congo River basin, Lakes Malawi and Tanganyika, the Volta River basin, the Shebelle River, and the Jubba River. In southern Africa, it is restricted to the middle and lower Zambezi, and the Buzi and Pungwe Rivers.〔
This demersal species is found in tropical freshwater habitats between . The juveniles are found in marginal habitats, while the adults prefer deep, quiet water between boulders and below overhangs, away from strong currents. They also occur beneath ''Salvinia'' mats and in river estuaries in Lake Kariba.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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