Survival Knife

The Survival Knife is a basic Tool crafted by using the Fabricator. It's main function is to procure samples of certain Flora and to ward off aggressive Fauna. It's especially relevant for the Survival mode of Subnautica as you will have to gain access to Coral Samples in order to craft Disinfected Water. The Survival Knife has a limited durability of about 100 strikes against an object. The Survival Knife is also capable of damaging the Cyclops and Seabases.

By using the Workbench the Survival Knife can be upgraded to Thermoblade or Hardened Blade.

Trivia

 * Markings on the Survival Knife indicate that it was made by "Alterra Arms Incorporated". Alterra is a corporation also known from the game Natural Selection 2, which was developed by Unknown Worlds Entertainment.
 * Survival Knife animations that were never implemented can be viewed here.
 * The Survival Knife will not do anything if the NODAMAGE Debug Console Command is active.