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.

Murky Water Lantern is a deep sea dragon. He is rarely seen, and many dragons of his clan do not even know of his existence. However, to the "Majestic Sea" water dragons and the others who live in the lakes of the eastern part of his clan, he can be sighted in the depths of the waters, hunting for deep-living fish and any other life that resides on the muddy, sandy floor of the lakes and rivers. Also, for some reason he can't really understand, he seems to feel a strange connection to a white dragon named Healing Rays, and the two often call each other 'brother' and assist each other in times of need or peril.