Petrocephalus ansorgii, the Agberi mormyrid, is a species of electric fish in the family Mormyridae, found in Africa: on the Upper and Lower Niger, the Bénuoé, and the coastal rivers of Nigeria.

[2] This species reaches a length of 14.1 cm (5.6 in).

[3] The fish is named in honor of English explorer and collector William John Ansorge (1850–1913), who collected the holotype specimen.

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