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.

As soon as Grandpa Is Strange hatched, he dove deep and never resurfaced, except to look at the tide pools, or gaze at the sky, or see what the pygmies are up to, or try to woo a land dweller, or eat things that don't live deep in the ocean... so he actually comes up to the shallow parts quite often but pretends he doesn't. His family line and ties aren't that well known beyond his grandparents, and he thinks the reason is that Granddad is a little loopy and can't remember anyone above his generation, or he lost the records.