Explaining Nature on Instagram: "The pufferfish, also called a blowfish, is famous for its ability to inflate its body like a balloon when threatened. It does this by quickly gulping water (or air if out of water), swelling to several times its normal size to scare off predators. Many species also carry tetrodotoxin, a powerful neurotoxin that makes them extremely poisonous—deadly enough to kill predators (and humans) if eaten. Despite this, in some countries like Japan, specially trained chefs