Serenoichthys is an extinct genus of small bichir from the Late Cretaceous (Cenomanian) of southeastern Morocco.

[1] The genus is monotypic, the type and only species being Serenoichthys kemkemensis.

[2] Only known at first from postcranial skeletons, complete specimens were later discovered.

[1] Serenoichthys was comparatively small, with the fossils discovered reaching at most 5 cm (2.0 in) in length — in comparaison, the contemporary polypterid Bawitius could reach up to 300 cm (9.8 ft).

[1] Like modern-day polypterids, Serenoichthys possessed a dorsal fin divided into a series of independent finlets each supported by a spine, a defining synapomorphy of the Cladistia.