1. Marine Mammals: Megalodon's massive jaws and powerful teeth suggest it was well-equipped to hunt and consume large marine mammals, including whales, dolphins, porpoises, and seals.
2. Fish: Megalodon likely targeted a wide range of fish species, from smaller fish like tuna, swordfish, and mackerel to larger fish such as sharks, rays, and billfish.
3. Sea Turtles: Sea turtles could have also been a part of megalodon's diet, as their hard shells may not have provided significant protection against the shark's teeth.
4. Smaller Whales: Megalodon's size and strength would have allowed it to prey on smaller whales, particularly sperm whales and baleen whales.
5. Giant Squid and Marine Cephalopods: These large invertebrates, with their soft bodies, would have been vulnerable to megalodon's attacks.
6. Pinnipeds: Marine mammals such as seals, sea lions, and walruses could have also been part of megalodon's diet.
7. Smaller Marine Reptiles: In its ecosystem, megalodon may have preyed upon smaller marine reptiles, such as plesiosaurs and mosasaurs (if they coexisted).
It's important to note that the megalodon lived millions of years ago, and the exact composition of its diet can't be fully reconstructed. However, based on the size, anatomy, and inferred behavior of megalodon, scientists have proposed these types of prey as possibilities.