With soft fur, pretty colors, and big eyes, many creatures can strike humans as cute and cuddly. However, some animals are more vicious than they look. Whether in acts of self-defense or seemingly unpredictable rage, some animals can fight back with strong bites, sharp claws, and sneaky attacks.

In general, you should avoid trying to touch or pet any creature in the wild if you don’t know how your presence will influence its behavior. And you may want to be especially cautious of the creatures below.

Here are the cutest animals that can deliver pretty powerful attacks or carry dangerous diseases, making them more dangerous than you might think.

Male platypuses have poisonous spurs

The platypus may look harmless, but scientists have found that male platypuses can be dangerous.

The males typically have sharp spurs on the heels of their feet. These spurs contain venom with 83 venom-related genes. The genes are similar to those of other animals like snakes and spiders. Although the venom can be deadly to some creatures, it generally can’t kill humans.

Brown bears will attack when provoked

Brown bears are known for being protective of their young. According to National Geographic, they will attack if provoked. If their enormous bodies and teeth aren’t threatening enough, their speed certainly is: they can run as fast as 30 miles per hour, making them difficult to escape.

Tasmanian devils can burst into fits of rage

Native to Tasmania, an island state off Australia’s coast, Tasmanian Devils can burst into fits of rage. The “devil” part of these creatures’ moniker comes from the fits of rage they can burst into when threatened. Their sharp teeth and muscular jaws allow them to deliver a more powerful bite than any other mammal their size.

Poison dart frogs are — you guessed it — poisonous

Poison dart frogs may be small, but they’re mighty. Found primarily in the Amazon rainforest, the tiny amphibians are about the size of a paper clip and are one of the most toxic animals on earth. According to National Geographic, a single poison dart frog carries enough poison to kill 10 grown men.