Deep Sea Dragons, as their name suggests, spend most of their time in the darkest depths of the sea. They have a bioluminescent dorsal spine that serves to attract prey and communicate with their own kind. As with many deep sea animals, they generally eat whatever they can manage to bait. They rarely leave the ocean floor, surfacing only during breeding season. When they do choose to travel to the shallower depths, they avoid bright lights and will only come up far away from shore.

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.

Illicit Serpentine is the child of an illicit pairing between his father and a striped dragon.  His egg was tended by the striped dragon's keeper and he was released to the ocean as a hatchling, but because of his mixed blood, he was shunned by other deep sea dragons until he found his father. Now that he is grown, he seeks out other mixed blood deep sea dragons, welcoming them to swim with dragons who understand them.