It is a fish species that lives in the ocean and is known for its unique defense mechanisms and potential toxicity. The body is usually round or oval in shape, with smooth skin and a small body size, typically ranging from 10 to 40 centimeters in length. Having sharp teeth, suitable for chewing hard foods such as shellfish and crustaceans. One of the most well-known characteristics is its ability to expand. When threatened, pufferfish quickly swallow large amounts of water or air, causing their bodies to expand into a ball shape to scare away predators. This swelling behavior not only protects pufferfish from predators, but also makes them difficult to swallow. Pufferfish have toxins in their bodies.