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.

Falin Trueheart, a Deep Sea dragon, is the wife of Green dragon Erinoso. Their first child, a Green dragon child, was abandoned by their owner under the condition that she had too many eggs to raise. The two have been afraid to breed ever since, but are slowly building up their courage.

Falin enjoys diving for treasure, which she hoards in her secret cave. She built a reed snorkel for her husband so he could go underwater as well. Falin's best friend is IGul, an Albino dragon.