Bomba is a Spanish variety of rice characterized by a short grain. The rice has a high content of amylose and a pearly white color of the grain. What distinguishes Bomba from most of the other varieties is that it can absorb two or three times its volume in water.
It will not burst, but hold its structure when cooked, expanding in width rather than in length, forming round bombs in the process. Bomba takes a long time to mature, and it has been harvested since the 14th century. Nowadays, it's mostly grown in wetlands south of Valencia.