Many underwater animals are carnivores, meaning they primarily eat other animals. Some well-known examples include sharks, octopuses, and barracudas. Sharks are apex predators that hunt fish, seals, and even other sharks. Octopuses use their tentacles to catch crabs, clams, and small fish. Barracudas are fast swimmers that prey on smaller fish. These carnivorous animals play a crucial role in maintaining the balance of marine ecosystems by controlling the population of other species.