Mimic Octopus(Thaumoctopus mimicus) is one of the popular animal diver requested when the diving in Lembeh Strait. The octopus have a capability to mimic more than 15 different species.Amazing huh!!..

To find this octopus require few skills. From far we can see it look like a mantis shrimp in a hole. By having long stick/pointer. Approach slowly. And poke the sand until we reaching below it. Will make them out from the hole.

By the way, it not so easy to make them out(They move and react fast. And Octopus known as one of clever animal). Mostly local dive guide expert with the skill. I had tried few times and only manage to make them out once hehehe..

Mimic Octopus Fact Finding (Wikipedia) :

The mimic octopus, Thaumoctopus mimicus, is a species of octopus that has a strong ability to mimic other creatures. It grows up to 60 cm (2 feet) in length. Its normal colouring consists of brown and white stripes or spots.

Living in the tropical seas of South East Asia, it was not discovered officially until 1998, off the coast of Sulawesi. The octopus mimics the physical likeness and movements of more than fifteen different species, including sea snakes, lionfish, flatfish, brittle stars, giant crabs, sea shells, stingrays, flounders, jellyfish, sea anemones, and mantis shrimp.^[1][2] It accomplishes this by contorting its body and arms, and changing colour.

Many octopus species are extremely flexible. For example, one octopus the size of a volleyball can actually squeeze its entire body into a soft drink can.^[3] If the mimic octopus has that flexibility, it would explain in part how it mimics other creatures.

Although all octopuses can change colour and texture, and many can blend with the sea floor, appearing as rocks, the mimic octopus is the first octopus species ever observed to impersonate other animals.^[2][4]

Based on observation, the mimic octopus may decide which animal to impersonate depending on local predators. For example, when the octopus was being attacked by damselfish, it was observed that the octopus appeared as a banded sea snake, a damselfish predator. The octopus impersonates the snake by turning black and yellow, burying six of its arms, and waving its other two arms in opposite directions.^[5]

The mimic octopus is often confused with Wunderpus photogenicus, another recently discovered species. The Wunderpus can be distinguished by the pattern of strong, fixed white markings on its body.^[6]