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.

Trying to get Bluefin to calm down is like trying to stop Rainpearl from making it rain. Everywhere she swims, she can't help but throw in a few acrobatics. She's always energetic and has never been seen slowing down for more than a few seconds—even when she sleeps, she always keeps one glowing blue eye open to make sure she can swim around more without crashing into anything.

It's very hard for other dragons to communicate with her, because not only will she never slow down, if you manage to catch up with her and converse, the mixture of telepathic jumbles and spine flashes she sends will be so fast that almost nobody can understand her. Some dragons think her strong will to keep swimming is admirable and that they can learn from her. Others just want to know how she manages to go so fast without really sleeping.