Synodontis haugi, known as the black synodontis, is a species of upside-down catfish native to Gabon where it is found in the Ogowe River basin. It was first collected by M.E. Haug and described by French zoologist Jacques Pellegrin in 1906, based upon a holotype discovered in the Ogooué River, near Ngomo, Gabon. The specific name "huagi" is a tribute to the original collector of the species.
Like other members of the genus, this fish has a humeral process, which is a bony spike that is attached to a hardened head cap on the fish and can be seen extending beyond the gill opening. The humeral process on this species is obtusely keeled, much longer than deep, acutely pointed, and extends slightly beyond the occipito-nuchal process. The first ray of the dorsal fin has a hardened first ray which is slightly serrated and is as long or slightly shorter than the head. The pectoral spine is as long as the dorsal and strongly serrated on both sides, especially the inner side. The caudal fin is deeply forked. It has short, cone-shaped teeth in the upper jaw. In the lower jaw, the teeth are s-shaped and movable. The fish has one pair of long maxillary barbels, extending far beyond the operculum, and two pairs of mandibular barbels that are often branched. The adipose fin is 3 to 3 1/2 times as long as it is deep. set far back.
- "Synodontis haugi Pellegrin, 1906". scotcat.com. Retrieved 17 October 2016.
- Froese, Rainer and Pauly, Daniel, eds. (2016). "Synodontis haugi" in FishBase. June 2016 version.
- "Synodontis haugi Pellegrin, 1906". Planet Catfish. 4 Aug 2006. Retrieved 17 October 2016.
- Boulenger, George Albert (1909). Catalogue of the fresh-water fishes of Africa in the British museum (Natural history). London: British Museum. pp. 436–438.
- Moelants, T. (2010). "Synodontis haugi". The IUCN Red List of Threatened Species. IUCN. 2010: e.T182489A7896971. doi:10.2305/IUCN.UK.2010-3.RLTS.T182489A7896971.en. Retrieved 15 January 2018.
Data related to Synodontis haugi at Wikispecies