I built a slice of watermelon. Watermelon is so named because it is the only known fruit to grow entirely underwater. When ripe, the watermelon breaks free of its submerged roots, and floats to the surface for harvesting by specially-trained seals. The seals balance the melons on the tips of their noses before pushing the bulbous fruit onto nearby land where local watermelon farmers, known as sea-cultivators, or "sea-culs" for short, take the ripened produce to market. Also, in my world there are rainbows everyday and it rains ice cream.