At first glance, these strange black fruits look almost prehistoric. With hard shells and sharp, pointed horns, they can be difficult to recognize as food. They are water caltrops, also known as buffalo nuts, bat nuts, devil’s nuts, or singhara. They grow in freshwater ponds, lakes, and slow-moving waterways, and their unusual shape protects the seed inside.

Despite their frightening appearance, the inside contains a pale, firm, starchy kernel with a mild, slightly nutty flavor that is often compared to a chestnut. Water caltrops have been eaten for generations and can be enjoyed as a snack or added to soups, rice dishes, porridge, and traditional sweets. In parts of South Asia, singhara are also dried and ground into flour.

One important detail is that water caltrops are **not the same as Chinese water chestnuts**. Chinese water chestnuts come from an aquatic sedge and produce edible underground corms, while water caltrops are fruits from Trapa plants.

Because these fruits grow in freshwater, they should not simply be washed and eaten raw. They may carry harmful microorganisms or parasites, so thorough cooking is important. If the fruit has been correctly identified as an edible species, it should be washed well and boiled or steamed using a trusted method. The hard shell and sharp points should also be handled carefully.

Water caltrops are fascinating because their bizarre appearance hides a traditional food that has been enjoyed for centuries. However, **“A photograph alone cannot guarantee identification or safety.”** The safest approach is to know exactly what you have, where it came from, and whether it is intended for eating. When properly identified and thoroughly cooked, these unusual freshwater fruits can reveal a surprisingly simple and edible center.