Water fountains, the depths of the high seas, and waterfalls are the breeding grounds for Blue Dragons. Since the Blue Eggs require to be underwater at all times, places underwater are the only places able to function as a nest for the Blue Dragons.

The Egg’s shades of blue, along with a brush of exotic colors, render it nearly undetectable when placed inside the water, in coral reefs or clusters of seaweeds. In most occasions, the nests are located at the bottom of a lake, deep underwater, making it nearly impossible for someone, except the for the Blue Dragons, to come near.