What is an octopusses beak made of?

An octopus's beak is made of chitin, a tough, flexible material that is also a primary component of the exoskeletons of arthropods. The beak is hard and pointed, allowing octopuses to bite and tear their prey. It resembles a parrot's beak in structure and function, enabling these creatures to consume a varied diet, including crustaceans and mollusks.