It produces a corrosive poison within itself that it will spray to deter foes and to help carve out its burrow within rock. If a foe is not deterred by its poison, it will curl up into a ball and wait for the foe to leave.
When it curls up in a ball, it can make any attack bounce off harmlessly. Their poison is strong enough to eat through the hull of a tanker, and they spit it indiscriminately at anything that enters their territory.