Chokuzan

The Chokuzan may be a humanoid species that was native to the Delta Quadrant.

In 2377, while Q Junior was under Captain Janeway's care, he stole the Delta Flyer II and took Icheb with him as they escaped through a spatial flexure. Once they exited it, far from USS Voyager, they were hailed by a Chokuzan starship, the crew of which ordered them to surrender their vessel, as they were trespassing in Chokuzan space. After receiving phaser damage from the Delta Flyer, the Chokuzan commander fired a weapon at the shuttle, which disrupted Icheb's tactical console and injured him with omicron radiation. Junior panicked and returned to Voyager for treatment.

Later, when Janeway and Junior returned to the Chokuzan ship, the commander revealed himself to be Q, who stated that he was just testing his son's response. 

Chokuzaner