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octopus day octopus blue-ringed octopus A blue-ringed octopus with bright blue rings on its beige body crawls over a rocky, coral-strewn seabed. common octopus
Swimming with a giant Pacific octopus
An octopus with outstretched tentacles swims underwater near rising air bubbles, illuminated by sunlight from above. common octopus common octopus
A brown cow in a grassy field scratches its face with a long-handled brush, with trees and a house in the background.
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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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octopus: Media

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Videos

Swimming with a giant Pacific octopus
Join researchers looking for the giant Pacific octopus (Enteroctopus dofleini).
Video: Contunico © ZDF Studios GmbH, Mainz
Veronika the Cow Demonstrates Tool Use
Austrian cow Veronika proved in 2026 that cows, like crows and chimps, have the ability...
Video: Antonio J. Osuna-Mascaró and Alice M.I. Auersperg. Flexible use of a multi-purpose tool by a cow. Current Biology, 2025.
Crazy in Love: Why Some Animals Eat Their Mates
Love can be a dangerous game.
Video: Encyclopædia Britannica, Inc.
Take a spectacular view of an octopus on a lava pillar in the northeastern Pacific Ocean
An octopus on a lava pillar in the northeastern Pacific Ocean.
Video: Major funding for this expedition was provided by NOAA Ocean Exploration Program and NOAA Vents Program; video clips edited by Bill Chadwick, Oregon State University/NOAA
See how the traditional Greek delicacy of octopus and tomato sauce is made
Learn how a traditional Greek dish of octopus and tomato sauce is made.
Video: Contunico © ZDF Studios GmbH, Mainz

Images

octopus
Octopus (Octopus species) swimming.
© ozgur/Fotolia
day octopus
Day octopus (Octopus cyanea).
© Richard Carey/Fotolia
blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena).
© davidevison/iStock.com
blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena).
© Sarawut Kundej/Shutterstock.com
common octopus
The common octopus (Octopus vulgaris) moving through water.
Beckmannjan
octopus
Octopus (Octopus species).
© Plancton Video/stock.adobe.com
common octopus
At rest, the common octopus (Octopus vulgaris) blends into its surroundings.
© Marineland of Florida
common octopus
The common octopus (Octopus vulgaris) may blanch when agitated.
© Marineland of Florida
Dumbo octopus
A Dumbo octopus (Grimpoteuthis species) swimming.
© NOAA Okeanos Explorer Program, Gulf of Mexico 2014 Expedition
blue-ringed octopus
Blue-ringed octopus (genus Hapalochlaena)
© Subaqueosshutterbug/iStock.com
Dumbo octopus
Dumbo octopus (Grimpoteuthis species).
NASA
Blue-spotted octopus (Octopus maculosus).
K. Fogassy/B.W. Halstead, World Life Research Institute
steps in the evolution of the eye in living mollusk species
Steps in the evolution of the eye as reflected in the range of eye complexity in...
Encyclopædia Britannica, Inc.
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