On the sandy, reefless seabeds off the coast of Sulawesi, Indonesia, hiding from hunters seemed like an impossible task. In 1998, marine biologists discovered how a small invertebrate measuring about sixty centimeters solved this dilemma: the mimic octopus (Thaumoctopus mimicus), the first known animal capable of dynamically impersonating multiple dangerous species.
Unlike other octopuses, which use their chromatophores to blend into the static substrate, Thaumoctopus mimicus actively modifies its body posture, swimming style, and visual pattern to embody more than fifteen venomous or aggressive organisms:
- Banded sea snake: It inserts six of its tentacles into a burrow and leaves only two visible, extended in opposite directions and undulating with black and white bands.
- Lionfish: It swims mid-water extending its arms radially to simulate the feathery, toxic spines of this predator.
- Venomous sole: It gathers all its tentacles into a teardrop shape, flattens its body, and propels itself by undulating along the seafloor like a toxic flatfish of the genus Zebrias.
The most fascinating trait of this creature lies in its tactical decision-making. It has been documented that, when harassed by territorial damselfish, the octopus does not choose a disguise at random: it immediately adopts the form of the banded sea snake, which is precisely the natural predator that hunts damselfish. This ability to assess context and deploy conditional mimicry reveals astounding cognitive flexibility in the depths.
Source: Proceedings of the Royal Society B: Biological Sciences
