Megalodon

Kevin MacLeod Hitman

1. Head and monstrous jaws

• Snout: It was more rounded and less pointed than the great white shark. The enormous jaws reached up to 2 meters in width.
• Teeth: The megalodon's main "decoration." About 276 massive, triangular teeth with distinct serrations along the edges, arranged in 5 rows. The largest teeth exceeded 18–19 cm in length. When the mouth was closed, they closed tightly, acting like giant scissors for cutting whale blubber and bones.

2. Fins

• Dorsal fin: The large triangular fin on the back of an adult could reach a height of 1.5–1.8 meters.
• Pectoral fins: They were long and wide, acting as stabilizers and wings to keep the heavy body in the water.
• Caudal fin: Similar to the tail of modern sharks of the herring family - the upper lobe was noticeably larger than the lower one, which provided a powerful push when jerking during hunting.

3. Skin color

Scientists use paleontological analogy. Like most large pelagic predators, megalodon likely developed countershading (dorsal-ventral chiaroscuro):
• A dark gray, gray-blue or brown back made the shark invisible to prey when looking down at it against the dark depths of the sea.
• A light gray or completely white belly blurred the silhouette of the predator against the background of the sun's rays breaking through the water when the prey looked up at it.

4. Scales and skin

In rare preserved fossil specimens, scientists discovered placoid scales on megalodon. These scales ranged from 0.3 to 0.8 mm in width and had wide grooves (keels). This structure reduced friction with the water and allowed the giant to swim virtually silently.
Want to learn more about the lifestyle of this updated, slimmer megalodon, or are you curious how scientists were able to reconstruct its appearance from just vertebrae?

The scientific consensus has changed: megalodon was much more slender, streamlined, and elongated than previously thought.
• Body Shape: Instead of the stocky, barrel-shaped silhouette of a great white shark, megalodon's body had elongated proportions. Scientists led by paleontologist Kenshu Shimada of DePaul University have determined that megalodon's anatomical proportions were closer to those of a modern lemon shark (Negaprion brevirostris) or a mako shark.
• Size implications: This elongated shape means the maximum body length could have been even greater—up to 24 meters (previous estimates stopped at 15–18 meters). However, it was not as massive and “thick” as previously depicted. Consequently, it expended less energy overcoming water resistance, making it an ideal cruising swimmer for long-distance migrations in search of whales.

Contrary to urban legends and science fiction films (like the 2023 sci-fi horror film "Megalodon"), scientists unanimously assert that this giant could not have survived to this day in the deep ocean, as it simply would not have had sufficient food supply there. You can read more about the history of the discoveries and the scientific debate in an article on Habr.

Megalodons disappeared completely around 3.6 million years ago. This was due to two main factors:

1. Climate change: Cooling oceans and retreating warm seas have reduced the shark's natural habitat.
2. Food competition: Whales began migrating to colder polar waters, where megalodon couldn't follow. At the same time, new dangerous rivals emerged—the ancestors of modern killer whales and toothed whales, which hunted in pods and were more effective predators.

• Size and weight: Because the shark's skeleton was made of cartilage, only teeth and a few vertebrae have survived to this day. Paleontologists estimate that the average length of megalodon was about 15 meters, and the largest specimens could reach 20–24 meters in length and weigh up to 47–94 tons.
• Enormous teeth: Megalodon teeth are the most frequently discovered by scientists. They were triangular in shape with serrated edges and could reach 18–19 centimeters in length. The predator's mouth, approximately 2 meters wide, contained more than 270 teeth arranged in 5 rows.
• Incredible bite: The bite force of the megalodon is estimated at 109 kN, which is several times greater than the capabilities of a modern great white shark and even a Tyrannosaurus rex.
• Diet: An adult megalodon required more than 1 ton of food per day. Its main prey were large marine animals: cetaceans, pinnipeds, large fish, and sea turtles. These predators lived mainly in warm coastal waters at depths of up to 200–300 meters, where there was the most food.