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Octopus facts for kids

Octopuses have eight arms. Octopuses are cephalopod molluscs, not fish; they have eight arms and no external shell.
Illustration of Octopus in its habitat

Wildlife Β· Marine habitats; common octopuses use rocky and sandy coastal seabeds

Biology and species
Octopuses; common octopus (Octopus vulgaris) as an example. Octopuses are cephalopod molluscs, not fish; they have eight arms and no external shell. Many octopuses are mainly solitary; species and situations differ.
Social life
Many octopuses are mainly solitary; species and situations differ.
How they talk
Changing skin colour and texture can provide camouflage and signals.
Babies
Female common octopuses guard their eggs; development differs between species.
Adaptations
Suckers help octopuses grip and investigate objects.

Conservation evidence

Conservation status must be checked for a named species and region. This overview does not assign one threat category or population total to a whole animal group.

Collectible rarity labels are game rewards, not conservation categories. Historical figures and dated assessments are not live population counts.

Sources for this animal

Did you know?

  • Octopuses are cephalopod molluscs, not fish; they have eight arms and no external shell.
  • Common octopuses eat crustaceans, molluscs and other prey.
  • Suckers help octopuses grip and investigate objects.

Quick answers

Where do octopuses live?

Marine habitats; common octopuses use rocky and sandy coastal seabeds

What biology facts should we know about octopuses?

Octopuses; common octopus (Octopus vulgaris) as an example. Octopuses are cephalopod molluscs, not fish; they have eight arms and no external shell. Many octopuses are mainly solitary; species and situations differ.

Do octopuses live in groups?

Many octopuses are mainly solitary; species and situations differ.

How do octopuses communicate?

Changing skin colour and texture can provide camouflage and signals.

What conservation information is available for octopuses?

Conservation status must be checked for a named species and region. This overview does not assign one threat category or population total to a whole animal group.

Facts describe the species or group named above. Follow the sources for evidence and assessment dates; findings about one species do not automatically apply to all related animals.

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