Ochthera mantis, the mantis fly, is a shore fly (family Ephydridae).

The species was first described by Charles De Geer in 1776.

[2] It is a Holarctic species with a limited distribution in Europe.

[3] Ochthera mantis is a predatory fly found primarily on sandy or muddy shores, with the also predatory larvae being aquatic.

This article related to members of the muscomorph flies superfamily Ephydroidea is a stub.