East Sea Turtle and the Pearl Picture

I am actually not familiar with Chinese mythology. But the first thing when I saw this sky, I thought of the East Sea (東海) where the Dragon King lives [link]

On a second thought the legend of Urashima Taro (浦島太郎) would be more appropriate. In this legend, a fisherman named Urashima Taro saved a turtle from a bunch of naughty kids. This turtle rewarded him a trip to visit a palace of the Dragon King. If I remember correctly the turtle gave him a pearl. Once he swallowed it, he would be able to breathe in the water.

Anyone can tell me if this legend is somehow related to East Sea?
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