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.

Young Aquari Neptune is an immensely playful and naive Water dragon.  She loves leaping as high as she possibly can out of her lake more than anything, trying to catch waterfowl as they fly overhead.  She shares a close kinship with Demona and Lioness, her adopted Two-Headed sister.  When she isn't playing, she's sunbathing on the lakeside beach at the entrance to the home cave, joking with Demona and Lioness or teaching the hatchlings about underwater life.  Her 'job' within the home cave is to catch sweetfish for the hatchlings; it's a novelty to them, and they view it as a welcome dessert to a meal usually consisting of deer or antelope.