Synodontis annectens is a species of upside-down catfish native to the freshwater rivers of Gambia, Guinea, Guinea-Bissau and Sierra Leone. This species grows to a length of 32.3cm (12.7inches) TL.
References
Lalèyè, P. . Synodontis annectens. . 2010 . e.T182042A7801701 . . 2010 . 10.2305/IUCN.UK.2010-3.RLTS.T182042A7801701.en . 15 January 2018. free .