What would eat a Crustacaen?

Crustaceans, such as crabs, shrimp, and lobsters, are prey for a variety of animals in their ecosystems. Common predators include fish, birds, and marine mammals like seals and sea otters. They can also be consumed by other crustaceans, such as larger crabs. Additionally, some species of octopus and certain types of sea turtles are known to feed on crustaceans.