cuttlefish

noun
  1. A marine mollusk of the order Sepiida, which is related to the squid and octopus, characterized by a unique internal shell called the cuttlebone, eight arms, and two longer tentacles used for capturing prey. Cuttlefish are known for their ability to change color and texture for communication and camouflage. noun
    The cuttlefish swiftly changed its color to blend in with the coral reef.
    Marine biologists are fascinated by the cuttlefish's complex behavior and intelligence.
  2. The cuttlebone of a cuttlefish, often used as a dietary supplement for pet birds, providing them with calcium and other nutrients. noun
    Pet owners often place a cuttlefish bone in bird cages to help maintain their pet's beak health.
    The parrot enjoyed nibbling on the cuttlefish bone provided by its owner.