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.

Deep is an especially shy Deep Sea. Like his uncle, Kailani, he will generally avoid other dragons and hide in dark trenches to escape them. His mother shames him for this, being a much more active and social dragon, so she and he don't tend to see eye-to-eye. Same goes for his father, Stripe, who is so loud and berating, Deep can't help but stay away from him. As isolated as he is, Deep is by no means aggressive. Though he doesn't like being near other dragons, he doesn't want to hurt them either. If he, by chance, lures a smaller sea dragon, he will deliberately dodge them and avoid catching them. He doesn't like violence, of any kind really. Generally, he prefers eating seaweed and kelp as opposed to fish. (He will still force himself to catch meat, of course, to round out his diet and live healthy.) As much as he quarrels with his family, Deep does not necessarily dislike them either, he just can't stand their more bombastic natures. Deep tends to hide instead of fixing problems.