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 ...

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.

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, ...