The Marrow is a species of mutated cartilage that is like a colony, working to keep the skull alive. Their variations allow them to have unique jobs and capabilities to support the Skeleton (or the colony) alive.
Skull: The prominent leader of the Skeleton. Rips off appendages that regenerate to create new marrow Ulna: The skulls personal guards and stealthy assassins. Pelvis: The only Marrow type that is an herbivore, used to carry around heavy objects due to its large size. Rib: A tiny, spider-like creates who comes in packs Ribcage: When several ribs come together, they make a ribcage, making them great for multitasking and patrol Spine: Spines act as a hunter, gathering food for the colony and being in groups of 2-6 Femur: With their incredible speed, they scout hunting grounds for the Spines, eliminating some weaker prey while doing so. Jaw: The Jaw has a large, dog-like body, and is used for the transportation of Marrow, food and sometimes used for battle. They are however blind, sing echolocation to navigate. Some Jaws have horns