Arròs Negre, also known as black rice, is a traditional Catalan dish that is popular in Tarragona. It is made with squid or cuttlefish, rice, garlic, onion, and squid ink, which gives the dish its distinctive black color. The squid ink not only adds color but also imparts a rich and savory flavor to the rice. Arròs Negre is a unique and flavorful dish that seafood lovers should not miss when visiting Tarragona.