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.

Deep sea dragons, as their name suggests, spend most of their time in the darkest depths of the sea. They have a bioluminescent dorsal spine that serves to attract prey and communicate with their own kind. As with many deep sea animals, they generally eat whatever they can manage to bait. They rarely leave the ocean floor, surfacing only during breeding season. When they do choose to travel to the shallower depths, they avoid bright lights and will only come up far away from shore.

This Sea Dragon's name means "Deep Dorkface" in Turkish. Derin is very proud, and has a high opinion of herself. She's a bit of a snob, and hates being proved wrong. She's very aware of her prestigious lineage, being the great-granddaughter of a king, and she sometimes lords this over others in order to get her way. However, there have recently been questions about the legitimacy of her claim to birthright. After all, where would a deep sea Dragon and a gold Dragon meet...