Parasitic ice covering the USS Discovery on The Colony in 3189
Parasitic ice was a form of ice that expanded rapidly, covering and eventually crushing everything it touched. Its growth accelerated in the shade, or in the aftermath of a spider lightning strike. Zareh noted he had once seen parasitic ice enter a person's throat. (DIS: "Far From Home", "All Is Possible")
The surface of the Colony contained glaciers of parasitic ice. In 3189, the USS Discovery crash landed on one of these glaciers and was nearly enveloped by the ice before it was pulled free by a tractor beam from Booker's ship. (DIS: "Far From Home")
Parasitic ice could be found on Kokytos. In 3190, Ensign Adira Tal became trapped in a patch of ice and had to be pulled free by their companions. (DIS: "All Is Possible")