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.

Uisce Dubh is a very odd dragon. He tends to speak in rhymes at times and he loves the salmon found in freshwater lakes. He lives in the Azure Bay with his mate Farraige Allan where they lounge on the seabed together. Uisce Dubh will often swim out to the tropical islands within his family's territory and lay his large head on the beaches where he will sleep for hours on end. He loves it when his owner lies on his head as he swims; they spend the time bonding with each other.