The Kolaati were a race from the Delta Quadrant. The Kolaati are a warp-capable race, who engage in criminal activities, for example, Narcotic trafficking.
Physiology
There are atleast two species of Kolaati. One of which has lime-green skin, the other a pale blue. All Kolaati have bony protrusions that extend from their fore-heads, and their temples.
Tosin was a Kolaati. (VOY: "Fair Trade")