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.

The end of Aldeyli's tail is frayed, so when she turns she is less graceful than most other water dragons.  However, the tail's frayed and weak nature provides less resistance in the water allowing her to swim faster in a straight line than most of her kind.  She loves racing in straight lines, but refuses to participate in winding courses.  She tries hard not to be a poor sport about her differences, but gloats to herself when she wins and sulks for a couple of hours after a loss or after declining a race involving many turns.