Watermelons are fruits featured in Super Mario World 2: Yoshi's Island. They appear like their real life counter parts, except that they grow on trees. If Yoshi eats a watermelon then he can shoot it's seeds to destroy targets and enemies. This attack is similar to shooting an egg, only they can only be fired directly up and forward. Similar fruits are the Fire Melon and Ice Melon. The Watermelon is Red Yoshi's favorite fruit in Yoshi's Old Island and the Green Yoshi's in Yoshi's Story. It also gives any Yoshi seed-spitting powers in Yoshi's Woolly World.
Melons also appeared in Super Mario Sunshine.