Deep Sea Fishing is a form of fishing where lines with hook-rigged lures are dragged behind a boat to entice fish to bite. Types of fish caught are tuna, marlin, swordfish and shark (occasionally - there are great white in the med so you never know....).
Deep sea fishing is a lot trickier than bottom fishing, but its obviously a lot more more enjoyable if you manage to catch a 200 kilo Marlin ( It will take you a couple of hours to reel in one of these!). With deep sea fishing, you can never guarantee a catch, but half the fun is waiting and hoping a fish bites the bait.