Calling these animals scary is an understatement. Welcome to WatchMojo, and today we’re counting down our picks for the most ...

Sure, they look scary, but those 50 rows of teeth are for ... This thrilling deep-sea fish was voted the world's ugliest animal by the Ugly Animal Preservation Society. But its jelly-like skin ...

From the fearsome piranha and vampire fish to the mighty anaconda, the crocodile, and the candiru, these are among the most terrifying reptiles, insects, spiders, and fish.