The Cephalopods (Class Cephalopoda) include squid, octopus and nautilus. Their name Cephalopoda means “head footed.” They are all fast moving ocean animals.
Habitat: They are all found in the ocean.
Physical Traits: They have a series of arms or tentacles that circle the “head.” Each arm has two rows of suction sups. Though the octopus has eight arms, some Cephalopoda have a mixture of arms and tentacles. Some having up to a 100 tentacles. Cephalopods have a relatively complex brain and eyes with good, color vision. They are thought to be quite intelligent and able to learn from experience. Squid and octopi have a funnel structure, called a hyponome, through which they can blow water to move themselves quickly along. Many species have ink to release if threatened and can change color to escape predators. Some cephalopods have shells to protect them, like the Nautilus, while others have an internal skeleton, like the squid. The octopus has neither.
Diet: They are predators, using their arms (or tentacles) to trap prey, and a sharp beak to bite prey. They then stuff prey into a central mouth.
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Amsel, Sheri. "Class - Cephalopoda (Nautilus, Squid, Octopus)" Exploring Nature Educational Resource ©2005-2023. September 23, 2023
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