Plenty of standing room: Carcharocles megalodon was the largest shark that ever lived on Earth.

They were probably preyed upon by predatory whales and sharks, including Carcharocles megalodon.

Based on the fossil record, we know that the extinct Carcharocles megalodon was the biggest shark that ever lived.

The jaws are constructed with 182 fossilized teeth of the world's largest shark, Carcharocles megalodon, which went extinct about 2 million years ago.

Or maybe it was a killing ground for the extinct 40-foot-long shark Carcharocles megalodon, or a long-term breeding area for seals and other marine animals.

They were originally classified as direct relatives of megatooth sharks such as the extinct Carcharocles megalodon, the largest carnivorous shark that ever lived.

The two major interpretations are Carcharodon megalodon (under family Lamnidae) or Carcharocles megalodon (under the family Otodontidae).

It is now clear that the ancient great white species shared habitat with the world's biggest megatooth, Carcharocles megalodon, a 60-foot monster whose jaw may have gaped wider than nine feet.

Members of this family include Cretoxyrhina, a genus from the Cretaceous, and Palaeocarcharodon, a possible ancestor of the Great white shark and perhaps the Carcharocles megalodon, which may be the largest shark to have ever lived.

Enya Kim from the Natural History department at auctioneers Bonhams & Butterfields stands inside one of the world's largest set of shark jaws comprised of about 180 fossil teeth from the prehistoric species, Carcharocles megalodon.

Three tooth marks on the rib suggest the whale was once severely bitten by a strong-jawed animal, and the wide spacing between tooth marks makes scientists believe the attacker was a mega-toothed shark Carcharocles megalodon, a Smithsonian release said Friday.

In other fossil news, the two that jump to mind are: fossil turtles caught in the act of mating; and a new fossil shark species which shows that Carcharocles megalodon was not a giant ancestor of today's white shark, but a member of a different lineage altogether.