Bol'akuls were large predators that inhabited the seas of Kircone. They had long triad-shaped bodies, with fin ridges running the entire length of the body at each of the three "corners." The body ended in a large triangular tail, while the head, separated from the body by a slightly narrower neck, consisted of three long jaws lined with teeth that were often up to a quarter of a meter long. A bol'akul's eyes saw best in the blue-green range.