Deep-sea fishing takes place at a depth of at least 100 feet (30m), allowing fishermen to catch large game fish that cannot usually be caught in shallower waters, such as swordfish, sharks, dolphin, tuna, and marlin. Many tourist and vacation areas offer deep-sea fishing charters, which are the best possible option for beginners. To deep-sea fish, you can book a charter, or you can go out on your own. Either way, you will need to know the basics of how to prepare for the experience and stay safe.