The porcupinefish, also known as spiny pufferfish, is a marine fish found in tropical and subtropical oceans. It is recognized for its unique ability to inflate its body by swallowing water or air, which makes it appear larger and deters predators. The fish has a spiny exterior, providing additional protection. Porcupinefish belong to the family Diodontidae and can grow up to 14 inches long. They primarily feed on hard-shelled invertebrates, such as sea urchins and crustaceans. Their diet and defensive adaptations make them an interesting species in marine ecosystems.