The Skrillings were discovered by a M'shinni exploration ship during the era of the Old Republic. The Skrillings had no name for their world, so the M'shinni simply named it Agriworld-2079. It was later determined that the name "Skrilling" was in fact a M'shinni term that means "bone picker."
As a people, the Skrillings avoided conflict, but were not afraid to take advantage of a situation if the conditions were right. They had once been a nomadic race, but the segmentation of agricultural land by the M'shinni forced them to form loose villages. Skrillings also had a unique talent that allowed them to continually ask the same question in many different ways, wearing their opponent down but never angering them. This allowed a Skrilling to ingratiate themselves into any situation, and it was believed that this was the method they used to gain transport on M'shinni cargo ships and escape Agriworld-2079.
The Skrilling race developed minimal levels of technology before the appearance of the M'shinni, and ha evolved only minimally since then.