When an Ice Worm enters hunt mode, they begin to rapidly attack the player, using dive attacks, pokes, spear attacks, and whip attacks. While tunneling, it can dash at the player, and if it catches them, it will spear them, and then fling them into the air, before swallowing them whole. If it is closer to the target it will do one of many close-range attacks. After it has lunged at the player, it will either emerge back out of the ground to do another attack or it will poke at the player from underground with its horn. If the player or Thumper is a reasonable distance from the Ice Worm, the Ice Worm will lunge at the target. Once it is above ground, it will do a loud roar before doing an attack. It is attracted to noise and vibration, and will surface to attack whatever produces these things. The Ice Worm travels just below the surface of the ice, producing a distinct trail of pushed-up snow accompanied by a jet of steam. The tail ends with a pair of long and thin spines. The inside of the upper and lower pair is lined with black spines. Each is long and curved with a solid black exterior and fleshy red interior. Below the horn, the creature's four mouth-parts can be seen. This horn is super-heated and allows the Ice Worm to melt through ice in order to burrow. The head is mainly comprised by a single huge plate which tapers into a long, thick horn sticking straight out from the head. The underside is grey in color and has two rows of parapodia used to grip the ice running parallel down the body. The underside of the creature is bare and unprotected, lacking any protective plating.

Beneath these plates are another set of triangular plates that stick out horizontally, each with a backwards facing spike.

The Ice Worm has a very long body, the top side of which is completely covered by a thick segmented exoskeleton.

Subnautica below zero wiki ice worm