The isk-ar represented a unique offshoot within the Tiss'sharspecies, a reptilian race. Their defining characteristic was their albinism, resulting in see-through white scales and a complete lack of any other unique features.
Behind the scenes
In the Ultimate Alien Anthology, the isk-ar are described as having the Gearhead feat, implying that certain biological or cultural aspects may contribute to their enhanced understanding of machines and computers.