This 7 March 2018 video says about itself:
TOP 8 MEGALODON MOST LETHAL ENEMIES
7 March 2018
The Megalodon Shark is historically considered the master of the seas; however, it was not alone in the oceans millions of years ago. There were very dangerous enemies who sought to dethrone him and could even kill him at times.
–MEGALODON VS LIVYATAN MELVILLEI (LEVIATHAN)
It definitely was the most suitable creature to give it a good fight and even annihilate the huge megalodon from the seas.-MEGALODON VS ZYGOPHYSETER VAROLAI
It is another of the extinct odontoceti cetaceans, belonging to the sperm whale family. And his name rightly means “murderous sperm whale.”-MEGALODON VS RHAMPHOSUCHUS
Called “crocodile snout” or “crocodile with beak”, it is an extinct crocodilian genus, whose appearance resembles the modern Malaysian false gharial.-MEGALODON VS BRYGMOPHYSETER SHIGENSIS
It is a species of extinct Odontoceti cetacean that lived during the Miocene in Japanese waters. Well, it is believed that it also lived in all the oceans of the time.-MEGALODON VS ALBICETUS
It is a genus of extinct sperm whale that lived about 15 million years ago in the middle Miocene. In 1909, it was discovered in Santa Barbara, California, where it is presumed to be a native.-MEGALODON VS CETOTHERIUM
Its name means “whale beast” and it is a disappeared genus of Mysticeti cetacean linked with modern whales.-MEGALODON VS AULOPHYSETER It is an extinct genus of sperm whale that lived during the Miocene, a time when Megalodon was already imposing in all seas of the planet.
-MEGALODON VS THE WORST ENEMY This enemy meant its definitive extinction …, or at least it is what we believe.
From RT.com:
Rare 10-million-year-old whale dug up in Crimea
20 Aug, 2018 07:36
The skeleton of an ancient whale was unearthed by archeologists in Crimea, Russia as they were examining a future railroad site. The animal lived in a sea which disappeared 10 million years ago.
The spine and ribs of a Cetotherium (Latin for ‘whale beast’), an extinct relative of modern whales, were discovered on the Kerch Peninsula as archeologists were examining land designated for railroad construction, local media reported on Friday.
The prehistoric creature was about five meters (16.5 feet) long. The discovery is not surprising, considering that the site was once deep underwater, at the heart of what was the Sarmatian Sea. “The sea eventually became land”, Sergey Yazikov, a researcher at the Archeology Institute of the Russian Academy of Sciences told local media.
“The geological layers have gone up, and the whale’s skeleton appeared on top, although it used to rest on the seabed.”
Dmitry Startsev from the Crimean University’s zoological museum said the remains are quite unique. “All fragments are part of a single specimen. Such discoveries don’t happen often. The structure of the bone tissue is highly visible.”
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