Isischthys is a monospecific genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes.

The only species in the genus is Isichthys henryi.

[2] It occurs in coastal river basins in West Africa, ranging as far southeast as the Kouilou-Niari River in Middle Africa.

[3] It reaches a length of about 29 cm (11 in).

[3] The fish is named in honor of Joseph Henry (1797–1878), first Secretary of the Smithsonian Institution in Washington, D.C.[4]