Ocean Atlas · Animals

Seals, octopuses, jellyfish and more

Mimic octopus

Thaumoctopus mimicus

On quiet Indo-Malayan sand, a long-armed octopus may briefly look like a sole, lionfish or sea snake. Give it space and never herd it to perform.

Least ConcernIn 7 Atlas countries

Least Concern (IUCN, 2016) means it is not at high risk of extinction worldwide today.

Length

Body (mantle) about 6 cm (2.3 in); with arms, largest recorded about 48 cm (19 in)

Weight

Not reliably measured

Next to a person

Arms included, large ones are about as long as an adult's forearm; the body is about the size of a thumb

What it eats

Small fish and crustaceans on open sand. It pokes its arms into burrows, and it can even enter a tunnel and come out of another hole up to about 1 m away.

Around people

Calm, give space

How it lives

The mimic octopus lives on soft sand and mud in shallow tropical water, from 0.5 to 37 m. It hunts by day, poking its long arms into burrows for small fish and crustaceans. When a threat comes, it can change shape and colour to look like toxic animals that share its home. Scientists are confident about three of these: banded soles, lionfish and banded sea snakes.

Where it goes

The mimic octopus does not migrate. It uses empty burrows of other animals as short-term homes, staying in one hole for one to four days, maybe within a network of holes in its home range. Some left their hole at first light, foraged all day and spent the night in the last hole they entered.

We only draw a journey on the map when scientists have tracked it or clearly documented it. For this animal we have not found one yet.

Populations

First filmed in Indonesia and described in 2005, it is known mainly from the Indo-Malayan region, from Indonesia, Malaysia and the Philippines to New Caledonia. Rare photo records extend the range to the Red Sea, the Great Barrier Reef and, since sightings in 2020 and 2022, southern Mozambique. It is easy to confuse with the wonderpus, a look-alike banded octopus.

Meet it respectfully

Muck dives happen very close to the sand. Keep fins and hands off the bottom, never touch, handle, poke or herd the octopus to make it show its mimicry, and do not block its way back to its burrow. Use gentle lights and few photos.

Fun fact

Tap the bulb to light it up.

Where you may meet it

Mimic octopus in the Ocean Atlas

Places we have researched where this animal is recorded. It is never guaranteed, and some places are for watching from the boat only.

FijiTanzaniaW. SaharaCanadaKazakhstanUzbekistanPapua New GuineaIndonesiaArgentinaChileDem. Rep. CongoSomaliaKenyaSudanChadRussiaFalkland Is.Fr. S. Antarctic LandsTimor-LesteSouth AfricaLesothoUruguayBrazilBoliviaGuyanaSurinameFranceZimbabweBotswanaNamibiaSenegalMaliMauritaniaBeninNigerNigeriaCameroonTogoGhanaCôte d'IvoireGuineaGuinea-BissauLiberiaSierra LeoneBurkina FasoCentral African Rep.CongoGabonEq. GuineaZambiaMalawiMozambiqueeSwatiniAngolaBurundiIsraelLebanonMadagascarPalestineGambiaTunisiaAlgeriaJordanUnited Arab EmiratesQatarKuwaitIraqOmanVanuatuCambodiaThailandLaosMyanmarVietnamNorth KoreaSouth KoreaMongoliaIndiaBangladeshBhutanNepalPakistanAfghanistanTajikistanKyrgyzstanTurkmenistanIranSyriaArmeniaUkraineAustriaHungaryMoldovaRomaniaGermanyBulgariaGreeceTurkeyAlbaniaCroatiaSwitzerlandPortugalSpainNew CaledoniaSolomon Is.New ZealandAustraliaSri LankaChinaTaiwanItalyAzerbaijanGeorgiaPhilippinesMalaysiaBruneiSloveniaEritreaJapanParaguayYemenSaudi ArabiaN. CyprusCyprusMoroccoEgyptLibyaEthiopiaDjiboutiSomalilandUgandaRwandaBosnia and Herz.MacedoniaSerbiaMontenegroKosovoS. SudanAmed, Bali, IndonesiaGili Trawangan, IndonesiaKomodo, IndonesiaGili Air, IndonesiaMaratua and Derawan, IndonesiaRaja Ampat, IndonesiaNusa Penida, IndonesiaLovina, Bali, IndonesiaCoron, Palawan, PhilippinesMoalboal, Cebu, PhilippinesPanglao and Balicasag, Bohol, PhilippinesSiquijor, PhilippinesApo Island and Dauin, PhilippinesApo Reef, PhilippinesBoracay, PhilippinesEl Nido and Bacuit Bay, PhilippinesPort Barton and San Vicente, PhilippinesTubbataha Reefs, PhilippinesPerhentian Islands, MalaysiaTioman Island, MalaysiaBourail, Poé and Déva, New CaledoniaNouméa and the Great Southern Lagoon, New CaledoniaPoindimié and Hienghène, New CaledoniaÎle des Pins (Kunié), New CaledoniaBaird Bay and Eyre Peninsula, AustraliaBarunguba and Narooma, AustraliaBremer Bay, AustraliaCairns, Port Douglas and the Ribbon Reefs, AustraliaChristmas Island, AustraliaCocos (Keeling) Islands, AustraliaLady Elliot Island, AustraliaLord Howe Island, AustraliaNingaloo, AustraliaRowley Shoals, AustraliaTasman Peninsula and Eaglehawk Neck, AustraliaMaria Island and the east coast, AustraliaTofo, MozambiqueDahab, EgyptMarsa Alam, Egypt

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