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The cuttlebone of a cuttlefish . This is the largest hard part of a cuttlefish , maintaining the rigidity of its body. The common cuttlefish is one of the largest species of cuttlefish with a mantle length reaching up to 45 cm and a mass of 4 kg on a presumed male, although this is for an exceptional specimen in temperate waters; specimens in subtropical waters rarely surpass a mantle length of 30 cm and 2 kg in mass. The mantle houses the reproductive and digestive tracts of the cuttlefish ... Learn about everything you ever wanted to know about cuttlefish . Journey through their unique characteristics, intriguing behavior, global habitats, and preferred diet. Explore their reproduction, and curious facts. Learn about their conservation status, and why these intelligent, colorful sea creatures are more than just a Mediterranean delicacy. Cuttlefish, any of about 100 species of marine cephalopods belonging to the order Sepioidea and characterized by a thick internal calcified shell called the cuttlebone. What are cuttlefish ? Despite their name, cuttlefish are not fish but intelligent invertebrates related to the octopus, squid, and nautilus.
