A harpoon is a long spear-like weapon used for hunting large sea animals, such as whales and fish. It typically has a barbed tip that allows it to catch and hold onto the prey once it is thrown or shot. Harpoons can be used from boats or from the shore, and they have been essential tools for many cultures throughout history. Modern harpoons are often made from strong materials like steel and can be launched using specialized equipment, such as harpoon guns. They are still used in commercial whaling and fishing, although many countries have regulations to protect endangered species like whales.