One of the biggest freshwater fish in North America ... thought just freshwater," wrote one person. "That is scary looking" read another comment. "I have seen the gar before but never had a ...

A TikToker who poured a drink into the ocean revealed what kind of aquatic animals are lurking near the surface, sparking a ...

Sitting on the seafloor, waving colorful tentacles, they lure fish, sting them, and eat them. Scary, squishy, cool, brainless, mesmerizing—jellyfish are all of these and a whole lot more.

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.