When you think of a watermelon, chances are good that you're imagining a large, round melon with a green rind and a bright pink, nearly red interior. But did you know that not all watermelons are pink? In much the same way that there are different varieties of apples, there are also different varieties of watermelon—and not all of them are pink and green. Each of these different watermelon types is slightly different in shape, size, texture, and, of course, color. And you can tell a lot about the way a watermelon tastes based on how it looks. According to the experts at the Watermelon Board, yellow and orange watermelons are generally sweeter than those with pink or red flesh. Seedless watermelons tend to have a crisper texture than those with seeds, they add.