Photos of a strange black food that resembles tiny bats or bull heads have gone viral online, leaving many people wondering what it really is. Despite its unusual appearance, the mysterious item is completely natural and widely enjoyed in several Asian countries.

The unusual food is known as the **water caltrop**, also called a **bat nut** or **bullhead nut**. It grows in freshwater ponds and marshes and has been a traditional seasonal food for centuries, especially during autumn festivals in China.

Inside its hard shell is a white, starchy kernel with a mild, slightly sweet flavor often compared to chestnuts or potatoes. Water caltrops are rich in fiber, antioxidants, and essential minerals such as potassium and magnesium, making them a nutritious addition to the diet.

Experts warn that water caltrops should never be eaten raw, as they may carry parasites. They should always be thoroughly boiled, steamed, or roasted before eating, making them both safe and delicious to enjoy.