Venomous Sharks live in the Thames River

There are many dangerous creatures in the world, and each one has a unique potential for danger. Hornets and bees, for example, attack in swarms. Cheetahs move quickly. Rattlesnakes are poisonous. Additionally, a shark swims quickly and possesses dangerous jaws. But that's all, at least. Except for a few shark species that are truly venomous as well.

It turns out that for a few species, including one that has been discovered in the Thames River in England, being a shark simply isn't terrifying enough. For many years, the Thames was virtually a trickle of death due to pollution, but recently, it has been steadily making a recovery, which has included sightings of spurdog sharks in the water. Spurdogs have envenomating spines in front of their dorsal fins and are slightly under two feet long.