Black Marrows are named for their dark colored hides which are encased in a distinct exoskeleton. Their skull and the top edges of their spine push out from under the skin as they age. As such, their young need excessive amounts of calcium for this armor to develop. The older a Black Marrow dragon is, the more skeletal their appearance. They often use their skeletal looks to lure in foolish scavengers or terrify predators. These vicious dragons love nothing more than to crack open bones with their stony beaks and eat the marrow inside. Voracious scavengers, Black Marrows will swarm and devour corpses both old and fresh, sometimes even dragging larger finds to the water to allow them to “ripen.” Despite their dreadful demeanour and often horrid stench, Black Marrows are devoted mates and parents.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

The night of the 28th of October 2011 was a cold, but clear night. GiratinaOF was walking through the area around the cave when he found some marrow eggs on near some cold rocks. They hatched soon and one of them was named "Sun Marrow".

This male is really strange for a Black Marrow dragon: He only kills to survive and hunts only sometimes. He is more like a good father for the children of others, either found in the cave or outside going on short trips with older hatchlings. One of this other interests is flying. Sun Marrow hunts from the air, where he plunges down onto his prey. But he also loves to sleep and take a break, what the other dragons aren't wondered about.