A harpoon gun is a specialized weapon designed to launch a harpoon, which is a long spear-like projectile, into marine animals such as whales or fish. It typically uses compressed air or a spring mechanism to propel the harpoon with great force, allowing for effective hunting or capturing of large sea creatures. Harpoon guns are commonly used in commercial whaling and fishing industries, as well as in scientific research. The design of the gun can vary, but it usually includes a trigger mechanism and a line attached to the harpoon for retrieval. Safety measures are essential due to the power of the weapon.