From Halopedia, the Halo wiki

A karo'etba is a type of carnivorous insectoid creature found on Sanghelios.[1] According to the Office of Naval Intelligence, the design of the Ghost, early versions of which were originally created by pre-Covenant Sangheili, was inspired by the karo'etba.[1][2] Fittingly, one of the most common design pattern variations of Ghost is the Karo'etba-pattern, named after the creature.