Domestic Cat

Even though cats tend to keep to themselves, they certainly have a mysterious side. It always seems like they’re up to no good, and they know more than we think they do. They’re responsible for more than 2.4 billion bird deaths every single year. If we were to switch birds with humans, then cats would be responsible for eliminating the human race twice over, every single year. Let’s keep these animals on our good side. Humans can also catch diseases from a cat bite, so if you are bitten by a domestic cat, take good care of cleaning the wound (via Best Life Online).

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).

Wolverine

Wolverines are medium sized, carnivorous mammals that are native to the northern regions of North America, Europe, and Asia. They are known for their strength, ferocity, and tenacity, and have a reputation as being one of the most formidable predators in their range.This creature will hunt anything and everything it happens to come across, and that includes human beings. While wolverines are not generally considered to be dangerous to humans, they are solitary animals and can be very territorial. They’ve been videotaped fighting wolves, and even though they’ve never killed a human, it’s best to stay far away from these animals (via Best Life Online).

Leopard Seals

Seals may seem like gentle, blubbery sea puppies, but they have us fooled. They have a dangerous streak. Leopard seals are large, carnivorous mammals that are native to the Southern Ocean surrounding Antarctica. They are named for their distinctive spotted coat and are known for their powerful jaws and sharp teeth. Leopard seals are one of the top predators in the Antarctic ecosystem and are known to prey on a variety of other animals, including seals, penguins, and fish. Even though they have cute faces and whiskers, they’re still aggressive predators that have been known to drown human beings. One researcher was killed in Antarctic waters after an aggressive leopard seal attacked him while snorkeling. Seals will kill any other warm-blooded prey, and that includes other seals (via Best Life Online).

Lion

Even though you might already know that lions are dangerous, they’re even more dangerous than you think. Observing these animals during a safari in Africa is relatively safe, but because they’re unpredictable, it’s recommended you keep your windows closed and limbs inside the vehicle during a safari. It is especially important to be careful around predators like lions, which are adapted to hunting and killing other animals. They kill an average of 100 humans every single year (via Best Life Online).