Obaichthys is an extinct genus of lepisosteiform fish that inhabited South America, Africa, and southern Europe during the mid-Cretaceous period.

It closely resembled modern gars, which it was related to, but differed in its spiny scales and restricted mouth gape.

The genus name references the Yoruba spirit Ọba, who is worshiped in the Candomblé religion in Brazil.

[1][2][3] The following species are known:[2] Indeterminate scales of Obaichthys, formerly referred to chimera genus "Stromerichthys", are known from the Albian of the Democratic Republic of the Congo.

Notably, these scales are morphologically more similar to those of the concurrent O. decoratus from Brazil than with the younger O. africanus, despite the latter being on found on the same continent.