Pufferfish usually have a relatively elongated and broad body shape. If threatened, however, they can quickly inflate their prickly bodies, making themselves hard to swallow.
This is not the only way pufferfish can defend themselves. Their internal organs contain a strong poison. It can prove fatal to humans who eat these fish, although the strength of the poison varies from species to species. In Japan, where restaurants specialize in serving pufferfish—the dish is known as fugu—highly
