Mimic Octopus
An octopus that impersonates other specific animal species — and chooses which species to mimic based on what predator is threatening it
No photo available for Mimic Octopus
Superpower
The mimic octopus (Thaumoctopus mimicus) doesn't just camouflage — it actively impersonates other animals with distinct body postures, color patterns, and swimming behaviors. Documented mimicry targets include the flatfish (flattening the body and rippling symmetrically across the seafloor), the lionfish (holding arms in a fan pattern and swimming with a bobbing motion matching the lionfish's silhouette), and the banded sea snake (hiding six arms in a burrow and waving the remaining two in the banded pattern). It appears to select which species to mimic based on which predator is present.
Overview
Thaumoctopus mimicus was first described by science in 2001 from footage shot in 1998 in Sulawesi, Indonesia. It was immediately recognized as unlike any octopus previously documented — most cephalopods camouflage to match their background; this one actively performs other species. Its mimicry appears learned rather than fixed: individuals have been observed switching between different impersonations mid-encounter, suggesting real-time decision-making about which performance is most appropriate. It is small (typically 60cm including arms), sandy-brown, and active during the day — unusual for an octopus.
Found in
Shallow sandy and muddy seafloors of the Indo-Pacific — first documented in Sulawesi, Indonesia, subsequently in Papua New Guinea, the Philippines, the Red Sea, and the Great Barrier Reef. Typically in water less than 15m deep.
Things worth knowing
- 1
The mimic octopus's flatfish impersonation is so precise that it adjusts the undulation frequency of its arms to match the size of the flatfish species common in the area it inhabits — different populations appear to mimic different local flatfish species.
- 2
Its mimicry appears to be active decision-making rather than fixed instinct: when one researcher placed a damselfish (a species that retreats from sea snakes) near a mimic octopus, the octopus immediately shifted to its banded sea snake performance.
- 3
Unlike most octopuses that are nocturnal, the mimic octopus is active in daylight, apparently relying on its mimicry rather than darkness for protection. This is itself extraordinary — day-active octopuses are unusual.
- 4
The mimic octopus's arms can act semi-independently — while most of the body is performing one mimicry behavior, individual arms may simultaneously be hunting in burrow entrances along the path it travels.
- 5
Only a handful of mimic octopus behaviors have been formally documented with sufficient rigor for scientific publication. Researchers believe the animal has a broader repertoire than currently described.