The ocean in my heart is the source of life and an indispensable part of people's lives. Now, people know more about the ocean, and they are also developing and using it more and more. In my mind, the future ocean world is like this: the blue ocean is like a mirror, no longer like an angry lion, mercilessly overturning ships and breaking through seawalls, and everything is so peaceful! Above the ocean, there are several beautiful seagulls flying freely on the sea from time to time! All this is so beautiful, but do you know why? Due to the rapid growth of the world's population, land is not enough for people to survive. So now people place their hopes on the ocean and build cities in the ocean. In Ocean City, people can travel freely in the ocean on new yachts. This yacht will not only pollute the ocean, but also make the seriously polluted seawater clear and can be directly drunk by people. It can not only shuttle freely in the sea, but also travel freely at high speed on the sea and land, taking away large vehicles such as cars, which greatly saves space. In marine cities, people live in houses made of special glass. This kind of house is warm in winter and cool in summer, and you can enjoy beautiful marine life through the glass. It's wonderful! People eat high-protein seafood, such as puffer fish, yellow croaker, hairtail and flounder. Strange and wonderful marine cities are so desirable!