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cephalopod
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References & Edit History Quick Facts & Related Topics
Images & Videos
blue-ringed octopus
Follow researchers into the waters off Vancouver Island in search of the giant Pacific octopus
blue-ringed octopus
Mating ritual of cuttlefish explained
Observe a cuttlefish changing its colour as it swims near the Great Barrier Reef, off the coast of Australia
How do octopuses and other cephalopods know what colours to display so as to hide from predators or to attract mates?
Watch the larger Pacific striped octopus unique shrimp-catching strategy
blue-ringed octopus ammonite fossils Image shows a reconstruction of squidlike creatures swimming.
For Students
blue-ringed octopus
cephalopod summary
Quizzes
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
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cephalopod: Media

class of mollusks
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Videos

Follow researchers into the waters off Vancouver Island in search of the giant Pacific octopus
Overview of the giant Pacific octopus.
Video: Contunico © ZDF Studios GmbH, Mainz
Mating ritual of cuttlefish explained
Learn about the reproduction of cuttlefish.
Video: Contunico © ZDF Studios GmbH, Mainz
Observe a cuttlefish changing its colour as it swims near the Great Barrier Reef, off the coast of Australia
A cuttlefish changing colour as it swims near the Great Barrier Reef, off the northeastern...
Video: © Fun Travel TV (A Britannica Publishing Partner)
How do octopuses and other cephalopods know what colours to display so as to hide from predators or to attract mates?
How do “colour-blind” octopuses know what colour to change to in order to hide from...
Video: Displayed by permission of The Regents of the University of California. All rights reserved. (A Britannica Publishing Partner)
Watch the larger Pacific striped octopus unique shrimp-catching strategy
Observe the unique shrimp-catching strategy of the larger Pacific striped octopus.
Video: Displayed by permission of The Regents of the University of California. All rights reserved. (A Britannica Publishing Partner)

Images

blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena).
© Sarawut Kundej/Shutterstock.com
blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena).
© SChantra/Shutterstock.com
blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena)
© Subaqueosshutterbug/iStock.com
ammonite fossils
A collection of ammonite fossils that date to the Lower Jurassic System.
© jonnysek—iStock/Getty Images
belemnoid cephalopods
Reconstruction of squidlike belemnoid cephalopods from the Cretaceous Period.
Courtesy of the American Museum of Natural History, New York
cuttlefish
Cuttlefish (Sepia officinalis).
Douglas P. Wilson
nautilus
A nautilus (Nautilus) floating in the water column of the ocean.
© Kristof Degreef/Shutterstock.com
octopus
Octopus (Octopus species) swimming.
© ozgur/Fotolia
Tropites
Courtesy of the trustees of the British Museum (Natural History); photograph, Imitor
organizational levels and body diagrams of mollusks
Figure 1: Organizational levels and body diagrams of the eight classes of mollusks...
Encyclopædia Britannica, Inc.
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