Arroz negro is rice that is black in color. But don't worry, it's not really made with black magic or anything like that, it's just colored that way with squid or cuttlefish ink. The ink is mixed in with the rice while it cooks, giving it the black color and a savory, slightly salty taste. It's a popular dish in some countries, particularly in Spain and the Philippines. So if you see it on a menu or at a dinner, don't be scared, it's just dark colored rice with a unique flavor!