Megalodon

Megalodon was the apex predators of the ocean, its bite-force was 40'000 pounds 5 times more powerful than a T-rex's bite and weighed about 70-100 tons. 10 to 14 elephants, 33 adult great white sharks, the size of the Megalodon is 3 adult great white sharks and  2 city buses. That equals 60 ft long. The Megalodon shark was thought to go extinct 2.6-1.5 million years ago, but people have found a Megalodon tooth that was about 11-24 thousand years old and that means the Megalodon shark has a 99% of still hunting the oceans of the world. Maybe the ancient Megalodon shark never went extinct, and 5% of the oceans have been explored leaving 95% unexplored and 1% of the oceans-floors have been explored leaving another 99% to go, the Megalodon could easily hide from us for that time. There has been a lot of proof that it did and didn't go extinct. Here are 3 terrifying pictures of the Megalodon:

         

The Megalodon once ruled the oceans and no animal on its own could take down the Megalodon as the Megalodon feasted on whales, smaller sharks, and other ocean mammals that got caught insight it's method of hunting was to first go under the prey and the next part of the method was to hit the prey at full speed, hitting them out of the water and paralyzing the prey for just enough time to have a nice short meal once again. The megalodon could even take down a pod of orcas if it was fully grown. Some people think it vanished off, to the Mariana trench and others think that it is in the coastal waters.