This is crazy and very scary.

An octopus is boneless, so its body is soft. Therefore, the octopus can squish into spaces much smaller than its size.

The rule of thumb is as long as the hole is big enough for the opening of its beak, which is the only bone within its body, then the rest of the body will be able to follow. This is why an octopus can fit in a small bottle as long as it has a neck that is big enough for the beak to fit into.

To the majority of us, this ability is strange because we see animals with bones or solid parts to their body that limits the flexibility they can bend.

An octopus is mainly muscle and skin, its body is elastic, and its arms can bend and twist to so many angles with flexibility. Some researchers have even tested the octopus's ability to see how small of an opening it can fit through, and people were shocked at the results.

In the wild, octopuses also use this ability to outsmart predators or to hide, often squeezing through tight cracks in rocks and crevices on the ocean floor.

People have even witnessed octopuses escape trapped containers with screw lids on them because they always find a way to open them.