Yak'Talon was a Jem'Hadar Seventh with a specialty in engineering. In 2374, Yak'Talon was serving in Keevan's group of Jem'Hadar when it crashed on a planet within a dark matter nebula. Remata'Klan took command and had Yak'Talon attempt to contact the Dominion. Yak'Talon was later killed when Keevan gave Benjamin Sisko advanced warning of an attack on them he had ordered and the tactics that the Jem'Hadar would use. (DS9 episode: "Rocks and Shoals", DS9 - The Dominion War novelization: Call to Arms...)