Flood stealth form

The Flood Stealth Form was a Flood Purestrain form. Like the Stalker Form, it excelled in the art of stealth to defeat the enemy, and was the only purestrain form to be able to use weapons with the aid of two, four-tentacled hands.

Trivia
This was first seen in The Art of Halo 3, though it was cut from the retail version of Halo 3.