Cuttlefish: Are squid -like marine mollusks comprising

Cuttlefish are squid -like marine mollusks comprising the cephalopod order Sepiida, characterized by an internal shell (cuttlebone) on their back, large W-shaped pupils, and a total of ten tentacles and arms (eight arms and two tentacles furnished with denticulated suckers). Despite their common name, cuttlefish are not fish but members of the invertebrate phylum Mollusca. They belong to the same cephalopod subclass Coleoidea with octopuses and squids. In some classifications, cuttlefish are ... Cuttlefish have oval-shaped, soft bodies with chromatophore cells that enable rapid color changes. They possess two side fins for undulating movement and a siphon under their head for jet propulsion. [3] Cuttlefish eat small molluscs, crabs, shrimp, fish, octopuses, worms, and other cuttlefish . Their predators include dolphins, larger fish (including sharks), seals, seabirds, and other cuttlefish . The typical life expectancy of a cuttlefish is about 1–2 years.