Two forms of this species are different in the shape of the dorsal fin (Ref. 4967).
- Whitehead, V. 1969 Investigations into the food habits of some juvenile fish in the Volta Lake during the period from October 1969 to March 1969 with some notes on distribution and abundance. University of Ghana, Volta Research Project Tech. Rep. X30. (Ref. 3681) http://www.fishbase.org/references/FBRefSummary.php?id=3681&speccode=5235