Watermelon block

A watermelon block   (or melon block) is a large watermelon shaped like a cube and is one of many kinds of blocks found throughout Super Mario Sunshine, along with brick blocks and sand blocks. Watermelon blocks are green with dark stripes on the outside and red on the inside; they likely derive their appearance from Japanese watermelons, some of which are grown.

Mario can destroy watermelon blocks only by ground-pounding them, making them the "opposite" of brick blocks, which can be destroyed only by jumping underneath them. They make a splashing noise when destroyed, and sometimes drop a single coin.