You decide upon an aquatic lifestyle, as you see that a rock diet will not be sufficient on the long run. So you begin your first years by hunting bigger schools of sharks, as well as the occassional albatross and gull. You grew vehemently, and your body adapts more and more to the biome you inhabit. Quickly you find your way around, always travelling between the coral reefs, the deep black sea, and the shorelines. Hardly ever you walk back on land.
In the corral reef you have found quite the supplements to your diet, as you begin to feed on anemones, sea snakes, and corals. The rocks surrounding the corrals have a uniquely pleasant taste to them, and a great colouration.
Your favorite food so far, however are the orca whales that happen to show up every now and then. Their flesh has made you bigger and more intelligent than ever, so it seems.
You began mapping the area, and have found several aquatic volcanos. The hot lava is a dangerous treat, but whenever you do reach out to these places you feel that its worth the effort.
You are 15 ft tall and 40ft long. Your body is slender, adapted to a life underwater. Your feet are finlike and your legs are long. Your tail is extremely long and very muscular. You have three rows of teeth, and the second row is especially powerful, long, and sharp. Eating rocks and corals has made your scales very tough, while the poisonous animals have made your skin slightly poisonous. Eating magma has given you the ability to produce extremely hot air from your lungs, giving you an effective steam breath.
You are 20 years old and a bit bored with your life. You could go on eating and eating, but you feel that there should be more to your life. Your dream of becoming a world dragon is still existant, but the swimming around part, gets on your nerves. It is time to find a suitable lair, for you to inhabit and decorate. Finding intellectual beings would brighten your day too, as you begin to feel lonely.