Watermelon and water

Watermelon is indeed very water-rich: USDA data list about 91.45 g of water per 100 g of raw watermelon flesh (about 91%). Other common references round this to 92–93%, while composition varies with cultivar and ripeness. Watermelon is one of the high-water foods, though it is not uniquely the most water-rich. [1–3]