Utopian Geography

Our utopia is an underwater city. We live in this city next to a small island used for fertile farming. The island has a wide variety of exotic animals and it provides us with adequate protection from three directions. The only enemy we have in our city is a shark-like creature with crocodile legs. Our city is surrounded by a bubble made of glass. We get our oxygen from a stone called hewa. When hewa gets wet it expands which gives us an unlimited supply. We have developed a ship that let's us travel to the surface. We call that ship ravioli. Did we mention lived on a different planet in a different galaxy? You know how an island grows from underneath. We live on a very stable cliff on the side of the island. The city is 20,000 feet underwater. The picture at the bottom is what our city looks like.