Esmaeilius shirini, the Shirin toothcarp, or Khosroshirin tooth-carp, is a species of pupfish belonging to the family Aphaniidae.

[1] It is found in the Khosroshirin stream of the Kor River basin, Fars province, Iran.

The species is threatened by the introduction of the predatory rainbow trout to their habitat.

[2] It is harmless to humans.

[3]