Do octopus tentacles tangle together

The octopus has eight soft tentacles, which are covered with suction cups and can stick to everything they touch, but their The tentacles never become tangled or knotted. How does an octopus do this?

The octopus uses unique chemical signals on its skin to identify its own body and prevent its tentacles from getting tangled together. Researchers have found that the octopus's skin can produce a chemical signal that reminds the sucker that "I am part of you," so its tentacles can stick to anything else they encounter, but not themselves. The movement of the octopus' tentacles is, to a certain extent, an automatic behavior and is not entirely controlled by the brain.

Scientists put octopus severed arms, live octopuses, skinned octopus severed arms, and petri dishes containing octopus skin mucus into a pool. They found that the octopus severed arms would not be sucked even if they had suction cups. Sticks to itself or to live octopuses and petri dishes, but will stick to skinned amputated arms, suggesting that the substance by which the amputated arms identify themselves is present in the octopus's skin. It can be seen that the octopus's tentacles rely on chemicals on their skin to recognize each other and move separately.

In fact, although the octopus is called a fish, it is not a fish, but a mollusk. The octopus has no backbone, and its whole body is made of soft muscles. It swims by using a funnel-shaped organ, and uses the reaction force of the water spray from the funnel to propel its body forward.