Waterhorse Dragons received their name due to their horse-like physique and endearing behavior. They are capable of surviving out of water, and when on land their skin secretes a gelatinous goo to retain moisture. However, their large paddle feet are better suited for swimming, and waterhorse dragons tend to move very awkwardly when on land. Waterhorses are very friendly dragons and enjoy playing with humans.

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.

While definitely more companionable toward others than his "rival", Neptunefin, this dragon has just as heated a temper. The two are constantly fighting and arguing, often over inconsequential things. For some reason, both believe that they have earned the title 'Lord of the Seas' and so are constantly goading each other into doing incredibly dangerous things "to prove their mettle". Their owner, and some other dragons skilled in conflict resolution, have tried nearly everything to end their feud, but nothing so far has worked. It should be noted that, if asked, neither dragon can recall what started the fight.