Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence 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. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

When water dragons mature, they lose their legs and the ability to survive on land, entering the water permanently. They are adept swimmers and eat whatever fish are in the lake they live in. They tend to inhabit the same lake for their entire lives, although a few live in the ocean and swim all over the world.

Nami of the Sea is one of the few water dragons to travel the sea and not stay in one lake. She began her adult life as a lone drifter but didnt mind much because ever since she was a young hatchling she always preferred to be alone to playing with her nest mates. Now for the first century of her life she remained solitary only coming into contact with the occasional band of water dragons traveling the sea or within a lagoon she stopped at to hunt. Now the biggest change in her life happened when she was around 150 years old when she came across an overcrowded lake on the verge of war (the lake was connected to the ocean by a rather large underwater tunnel). She then spent her time at the lake convincing one group of the water dragons to follow her out into the sea where there was much more space and feeding. Since then she has been traveling to what overcrowded bodies of water she can to try to convince the water dragons there of the wide open spaces and abundant food of the sea.