Don Bocarte use fresh wild bluefin tuna, fished using the traditional almadraba method, a type of sustainable fishing that takes place in Barbate (Cadiz) between May and June. Almadraba fishing was invented by the Phoenicians 3000 years ago, the almadraba is an ingenious system - the nets are positioned precisely in the section of the sea (close to the Straits of Gibraltar) where the tuna pass on their way to the Mediterranean, as they migrate to warmer water. Every year in May, after the first full moon, fishermen from towns on the Cadiz part of the Costa de la Luz, set up a complicated labyrinth of nets off the Atlantic coast, called the almadraba, to catch bluefin tuna. This is a major social and gastronomic event, providing essential (if seasonal) work for fishermen, packing factories, restaurants along the coast.