Pufferfish
It may come as a surprise that pufferfish is one of the most poisonous vertebrates in the world. To protect themselves, they’ll inflate their bodies and release tetrodotoxin. This toxin is lethal to not only fish but humans, too. One pufferfish carries enough toxins to kill 30 human beings. This poison is up to 1,200 times more toxic than cyanide. The pufferfish is also considered a delicacy in Japan. Only professional, trained chefs can prepare a pufferfish for human consumption. With one wrong move, someone eating pufferfish will die almost instantaneously (via RD).

Giant Pandas
Even though giant pandas aren’t related to red pandas, it doesn’t make them any less dangerous. Even though these cuddly animals seem friendly and inviting, they’re a lot more dangerous than you think. Their teeth are strong enough to cut through bamboo, so you can only assume what those teeth could do to a human. No one wants a 250-pound bear chasing them, either. Even though these animals like to avoid any confrontation, they’re not afraid to attack when they feel provoked (via Best Life Online).