The clown triggerfish
When it comes to aggressive fish, few are as violent as the creature that appears at the end of this list. Despite their funny name and colorful appearance, clown triggerfish are far from being the friendly companions you’d expect them to be.

Growing up to 50cm in length, these animals are solitary loners in the wild. Besides being territorial, clown triggerfish are ferocious predators that feed upon crustaceans and mollusks by crushing them with their powerful teeth. Can you imagine what would happen if one of these things bit your finger?