* Aquatic insects: Mayflies, caddisflies, stoneflies, and midges
* Terrestrial insects: Ants, beetles, and spiders that fall into the water
They use their mouths to suck up these insects from the substrate or the water column. They also occasionally consume small crustaceans, such as copepods and amphipods.
It's important to note that their diet can vary depending on the availability of prey in their specific habitat.