You are looking at a yellow square watermelon that i grew in my garden. This is my first SQUARE watermelon.
I grew up eating a lot of yellow watermelon instead of the traditional red watermelon.
Check out this link - Square watermelons selling for $860 each in Moscow, July 24, 2013 - http://www.mnn.com/food/healthy-eating/stories/square-watermelons-selling-for-860-each-in-moscow
one day, i will ave square watermelons too :3