Що обмежує восьминога у вузькій щілині? | What limits an octopus in a narrow gap?

An octopus can squeeze through a very narrow opening because its soft body has no bones. The beak is the limiting rigid part: if it can pass through a gap, the rest of the body usually can follow. Eye size is not the main guide—the eyes sit on the sides of the head, while the body can change shape around them. The exact minimum opening depends on the species and size of the octopus.