18 fishermen from Sicily are in jail in Benghazi, accused of fishing in Libya’s waters. And in this part of the Mediterranean rich in the highly-prized and lucrative red prawn, these kinds of arrests are frequent. Usually the Libyans release the men after negotiations. This time it’s different. Gen Khalifa Haftar – the warlord with authority over the east of Libya – is demanding a prisoner swap: the freeing of 4 Libyans in jail in Sicily convicted of human trafficking and implicated in the deaths of 49 migrants, in return for the fishermen. For Crossing Continents, Linda Pressly explores a little-known conflict in the Mediterranean - the so-called War of the Red Prawn, and its fall-out.