Invertebrate

Mimic octopus

Thaumoctopus mimicus

IUCN status: Unknown

A long-armed sand octopus able to imitate the shape and movement of other animals such as flatfish, lionfish and sea snakes. Active by day over open muck, unlike most octopus. Lembeh is one of the more reliable places in the world to find it.

Max size
~60cm arm span
Habitat
Open black-sand flats near burrows

Best places to dive with Mimic octopus

rareoccasionalcommonly seenpeak season
Anilao, Batangas
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Found on silty muck sites like Secret Bay; a sought-after but unpredictable sighting.

Lembeh Strait
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Seen through the year at sandy sites like TK, but never guaranteed on a given dive; depends on the guide locating an active individual.

Sources & last checked

Checked July 2026

This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.