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.

Black Sea Stallion is a deep sea dragon, only surfacing to mate with his beloved partner, Leopardshock and to observe his eggs' birth. Black Sea Stallion spends the majority of his time in the depths of the sea, where light does not touch the rocks in which he shelters. It is there, in his underwater cave, where he mourns in secrecy for his previous lover, Dove Hearts of Purple, who died as a hatchling. While he loves his mate, he does not deny the fact that he would much rather have been with Dove Hearts of Purple.