1. Enormous Size: Megalodons were massive sharks. Length estimates vary widely, but many scientists suggest that they could reach lengths of up to 16 to 20 meters (52 to 66 feet). Some even speculate that exceptional individuals could have grown even larger, perhaps exceeding 20 meters (66 feet) in length.
2. Robust Body: Megalodons had a robust and powerful build. They had a streamlined, fusiform body shape that allowed for efficient movement through the water.
3. Teeth: One of the most distinctive features of Megalodons were their massive teeth. They had triangular, serrated teeth that could measure up to 18 centimeters (7 inches) in length. Their jaws were capable of delivering powerful bites that could crush the bones of their prey.
4. Jaw Anatomy: Megalodons possessed massive jaw muscles, which allowed them to generate tremendous bite forces. Some estimations suggest that the bite force of Megalodons could have been several times stronger than that of modern-day great white sharks.
5. Coloration: The exact coloration of Megalodons is not known for certain. Some reconstructions depict them with a bluish or grayish coloration, while others show them with patterns or variations in shade. Given the diversity in coloration among present-day sharks, it's possible that Megalodons may have had color patterns of their own.
6. Fins: Megalodons likely had a dorsal fin, a pelvic fin, and an anal fin, similar to other sharks. However, the specific shape, size, and positioning of these fins are not precisely known.
7. Habitat and Distribution: Megalodons were widely distributed, possibly inhabiting temperate to warm open oceans during the Miocene and Pliocene epochs. They were apex predators and occupied a top position in the marine food chain, preying on a variety of marine animals, including other sharks, whales, and marine mammals.
Due to the fragmentary nature of fossil evidence, some aspects of Megalodon's appearance and biology are still subjects of scientific debate and research.