Deep-sea fishing is a type of fishing that takes place far from the shore, usually in waters deeper than 30 meters. Fishermen use large boats and specialized equipment to catch various types of fish, such as tuna, swordfish, and shark. This method allows them to access a wide range of marine life that is not found in shallower waters. The process often involves using heavy fishing gear, including long lines and nets, to capture fish. Deep-sea fishing can be both a commercial activity, providing seafood for markets, and a recreational hobby for those seeking adventure on the open ocean.