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.

Aegaeon, despite being a water dragon, is often of a difficult temper. He is soothed only by the melody of song and thoughts of the ancient ocean from which he came. When his temper is stirred he is known to be deadly, as it is not beyond him to summon deadly storms and create havoc with whirlpools and far reaching waves.

Despite this, he is not evil, merely alone, never having known another of his likeness, though he knows such exist. Hope was unknowingly brought to him by Eosphoros-Hesperos, who had sung of such things while flying over his watery inlet.