Ciliates are a type of single-celled eukaryotic organism that use cilia, hair-like structures that extend from their cell surface, to create currents in their surrounding water. These currents pull in bacteria, food particles, and other small organisms that they then consume.

Here's a breakdown:

* Cilia: Tiny hair-like structures that beat in a coordinated rhythm.

* Currents: The coordinated beating of cilia creates currents in the water surrounding the ciliate.

* Food Capture: These currents bring food particles, like bacteria, towards the ciliate's oral groove (mouth).

Some examples of ciliates include Paramecium and Stentor.