12. Pufferfish
The Pufferfish, also known as the Blowfish, may look cute and harmless when inflated, but it is actually one of the most poisonous fish in the world. Its defense mechanism involves puffing up its body into a spiky ball by swallowing water or air. Although not aggressive, the Pufferfish carries a powerful neurotoxin called tetrodotoxin. Even a small amount of this toxin can cause paralysis, organ failure, and death if ingested. Despite its deadly nature, some cultures consider Pufferfish a delicacy, but preparing it safely requires extensive skill to remove the toxic parts.
