When Water dragons mature, they lose 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.
Rapid99, as her name states, is the 99th member of the Rapid Clan. She oftentimes leaves her loved ones to travel around the world in the vast oceans. Rapid99 often vanishes from the cave for at least three months, then reappears with interesting tales about her travels. KimokotheDragon often writes these tales in a book or journal of sorts. Maybe when she gets very old, she may publish this book of fantastic tales for other humans to enjoy and learn more about the Rapid Clan.