Cuttlefish eat small molluscs , crabs , shrimp , fish and other cuttlefish , but can be eaten by predators , including sharks , fish , and other cuttlefish . Cuttlefish eat small molluscs , crabs , shrimp , fish , octopuses , worms , and other cuttlefish . Their predators include dolphins , sharks , fish , seals and other cuttlefish .