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.

Dive started off life swimming around in the bathtub of her cave mistress. However, it was soon apparent that the tub was not deep enough for Dive's liking. The cave mistress tried putting her in the lake with the water dragons, but this too was deemed inadequate. As Dive grew the cave mistress took her to the sea, where she soon found contentment at the bottom of the ocean floor. The cave mistress does not see Dive as often as she does the other dragons, but they do their best to remain close.