The Dnyarri are a fictional alien species from the Star Trek universe, specifically introduced in the original series episode titled "The Lights of Zetar." They are depicted as small, telepathic beings with the ability to control the minds of other creatures, making them a formidable threat. Their unique abilities allow them to manipulate individuals, often leading to chaos and conflict. In the episode, the Dnyarri are shown to have a complex relationship with their environment and other species. Their telepathic powers are central to their identity, and they are often portrayed as a cautionary example of the dangers of mind control and manipulation in the broader context of interstellar relations.