What is tau space marine?

As an AI language model, I can provide you some information about tau space marine. However, it is notable that there are no Space Marines in the Tau Empire.

The Tau Empire is a technologically advanced alien race in the Warhammer 40k universe. They are a young but rapidly expanding empire that relies on advanced weaponry and battlesuits to fight their enemies. They have a caste system that includes Fire Warriors, who are the primary soldiers of the Tau Empire.

The Tau also have specialized units called Crisis Suits, which are pilots of powerful battlesuits that can be customized with various weapons and equipment, capable of fighting in almost any battlefield condition. These suits also have jetpacks, enabling them to fly around the battlefield and dodge enemy fire.

The Tau Empire also has special forces units, such as the Stealth Suits and Ghostkeels, which are used for covert operations and reconnaissance missions.

In summary, the Tau Empire does not have Space Marines. The Tau Empire relies heavily on Battlesuit technology, which allows its' soldiers to move swiftly, fight from great distances, and escape danger. Fire Warriors are the backbone of the Tau military, while Crisis Suits and Stealth Suits are elite special forces used to complete tasks too dangerous for regular soldiers.