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. These guns are commonly used in commercial whaling and fishing industries, allowing for greater distance and accuracy when targeting large sea creatures. The design of a harpoon gun typically includes a barrel, trigger mechanism, and a propulsion system, which can be powered by compressed air or gunpowder. Harpoon guns have evolved over time, with modern versions often featuring advanced technology for improved efficiency and safety in marine environments.