The alien creature is a massive, plant-like lifeform which dwells beneath the surface of the planet. It can grow at an alarming rate, visible to the naked eye, and can spread on both organic and inorganic material. It is highly resistant to harm. Destiny's entire supply of chemicals, including squiggler venom and hydrochloric acid, had no effect. It can also withstand large amounts of heat; a small sample required a sustained burst from a flamethrower to kill. It is sensitive to the energy burst given off by a Stargate during its activation, but this only drives it back momentarily.