Octopus Beak: How This Hard Mouthpart Works in a Soft Body
An octopus is mostly soft-bodied, but it has one conspicuously hard feeding structure: the beak. The beak sits at the center of the arms, inside the mouth, and is used to bite and process prey.
Where is the beak?
If you look at the underside of an octopus, the mouth is located where the eight arms converge. The beak is largely hidden inside the surrounding tissues, so it is not normally visible when the animal is moving.
What does it do?
The beak grips and breaks food. Octopuses eat a variety of prey depending on species, including crustaceans, mollusks and fish. The beak works with other feeding structures and secretions to help process prey before swallowing.
Why is the beak important to flexibility?
Because most of the body lacks rigid skeletal parts, an octopus can squeeze through remarkably small spaces. The hard beak is one of the structures that limits how small an opening can be.
Do octopuses have teeth?
Not teeth like mammals. Cephalopods have a beak and also a radula, a ribbon-like feeding structure bearing many tiny tooth-like elements used in food processing.
How does this fit with the rest of the body?
The octopus uses muscular arms and a flexible mantle rather than a bony skeleton. See our octopus skeleton guide for the broader anatomy.
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