The sharp-jawed buntingi (Oryzias orthognathus) is a species of ricefish in the family Adrianichthyidae.

The sharp-jawed buntingi is known to live in a freshwater environment.

It is the native to the areas of Indonesia, Asia, Lake Poso, and central Sulawesi.

The sharp-jawed buntingi is considered to be a non-migratory species.

The maximum recorded length of this species as an unsexed male is about 6.5 centimeters or about 2.55 inches.