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Animal lists · 12 entries

Animals That Change Colour

Colour-changing animals — including chameleons, octopuses, cuttlefish and flounders — alter appearance through chromatophores, iridophores or structural mechanisms, ranked here by speed and range of colour change rather than by permanent seasonal colour variation such as arctic fox pelage.

Updated 25 July 2026

Colour change comes in several forms. Rapid active camouflage — an octopus matching a reef in seconds — is not the same as seasonal moulting or gradual colour morphing. Arctic foxes turn white in winter through fur replacement, not by changing the colour of existing tissue.

This list includes animals that actively alter body colour or pattern within minutes to hours using physiological mechanisms. Seasonal coat changes and developmental colour shifts are noted but distinguished from true rapid colour change.

How this list was compiled

Entries are species that actively change body colour or pattern within hours or less through physiological mechanisms — chromatophore expansion, pigment dispersal or structural colour change. Seasonal fur or feather replacement is noted separately and not counted as rapid colour change. Speed and range of change are noted. Species that change colour only during moulting or development are excluded from the primary ranking.

Animals That Change Colour

  1. Cuttlefish

    Seconds; full pattern control

    Millions of chromatophores controlled by direct neural commands. Can produce moving patterns for communication and camouflage.

  2. Octopus

    Seconds; texture and colour

    Changes both colour and skin texture to match surroundings. Controlled by chromatophores and papillae.

  3. Chameleon

    Minutes; mood and temperature

    Contrary to myth, camouflage is secondary to mood, temperature and social signalling. Crystal-containing iridophores shift hue.

  4. Flounder

    Hours; background matching

    Flatfish match seafloor patterns through chromatophore adjustment. One eye migrates during development.

  5. Squid

    Seconds; communication and camouflage

    Some species produce pulsing colour displays for mating and threat. Chromatophore control is among the fastest in nature.

  6. Golden tortoise beetle

    Minutes; moisture-controlled

    Shifts from gold to red-orange by changing moisture levels in a transparent cuticle layer.

  7. Crab spider

    Days; flower matching

    Some species gradually shift body colour to match flowers they hunt on — slower than cephalopod change.

  8. Arctic fox

    Seasonal; fur moulting

    Turns white in winter through fur replacement, not chromatophore change. Included because it is commonly confused with active colour change.

  9. Ptarmigan

    Seasonal; feather replacement

    Moults between brown summer and white winter plumage. A seasonal change, not rapid active camouflage.

  10. Anole lizard

    Minutes; stress and temperature

    Green anoles turn brown under stress or cold through chromatophore action — less dramatic range than chameleons.

  11. Sea hare

    Hours; diet-derived colour

    Colour reflects algae eaten. Can release purple ink as defence. Gradual rather than instant change.

  12. Mantis shrimp

    Communication displays

    Colourful appendages used in threat and courtship. Body colour change is limited compared with cephalopods.

Key facts

  • Cephalopods — octopuses, cuttlefish and squid — change colour in seconds using millions of chromatophores under direct neural control.
  • Chameleons change colour primarily for mood, temperature and communication — not mainly for camouflage as commonly claimed.
  • Seasonal colour change through moulting, as in arctic foxes, is a different mechanism from rapid active camouflage.
  • Flatfish match seafloor patterns over hours — slower than cephalopods but effective for ambush predation.
  • Some insects change colour over days by altering moisture in their cuticle rather than through chromatophores.
  • Colour change speed and range vary enormously — from seconds in cuttlefish to months in seasonal moulters.

Animals That Change Colour: frequently asked questions

Which animals can change colour?
Cephalopods — octopuses, cuttlefish and squid — are the fastest and most versatile. Chameleons, anoles, flatfish and some insects also change colour through various mechanisms.
Do chameleons change colour for camouflage?
Partly, but primarily for mood, temperature regulation and social signalling. The popular belief that they match any background instantly is exaggerated.
How do octopuses change colour?
Through chromatophores — pigment-containing cells expanded or contracted by muscles — and iridophores that reflect light. The brain controls patterns directly.
Can mammals change colour?
Not rapidly. Arctic foxes and ptarmigans change colour seasonally by moulting and growing new fur or feathers — a process taking weeks, not seconds.
What is the fastest colour change?
Cuttlefish and squid can alter patterns in fractions of a second. Chromatophores are under direct neural control, making cephalopod colour change the fastest in the animal kingdom.
Why do animals change colour?
For camouflage, communication, temperature regulation, mood signalling and mate attraction. The reason varies by species — not all colour change serves the same function.

Sources

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