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Hobotnice si ob metu nastavijo material pod telo, iz katerega izpljunejo močan curek vode, ki odnese material v želeno smer. Vir: Pxfuel
Hobotnice si ob metu nastavijo material pod telo, iz katerega izpljunejo močan curek vode, ki odnese material v želeno smer. Vir: Pxfuel

Violent Octopuses

Octopuses are very resourceful and likeable, and sometimes violent.

If other octopuses get on their nerves, they throw sand, pebbles or even shells at them, an Australian research team has found.

Scientists have long thought that they hit a nearby octopus with sand only by chance, as they usually throw it all around while cleaning their homes.

However, by monitoring the behaviour of octopuses in the Australian Sea, they realized that octopuses that deliberately obstruct others behave differently.

Zmožnost metanja predmetov v druge hobotnice kaže na zelo visoko inteligenco hobotnic. Vir: Wikimedia Commons
The ability to throw objects at other octopuses indicates very high octopus intelligence. Source: Wikimedia Commons

The ability to throw objects at other octopuses indicates very high octopus intelligence.

Other octopuses recognize this behaviour and quickly see that something will hit them, so they often prepare to retreat. Interestingly, attacked octopuses usually do not respond by throwing back.

For example, a research team observed a female throw sand at a male ten times when he tried to mate with her. She hit him only five times as the male managed to retreat without throwing anything at her.

»Such a sequence of events convinced me that the throws were intentional,« says the head of the research, Dr. Peter Godfrey-Smith.

While observing the behaviour of the octopuses, they even noticed a scene where throwing a shell at another octopus was reminiscent of passing a frisbee.

e kakšna riba prekriža pot hobotnici na lovu, se ji slabo piše. Vir: Wikimedia Commons
If a fish crosses the path of an octopus on a hunt, it doesn’t end well. Source: Wikimedia Commons

Mostly, sand or shells were thrown by females targeting males.

Throwing objects at other individuals is a very rare phenomenon in animals because it requires a very high level of intelligence. It has only been recorded in chimpanzees and some other primates.

Octopuses have repeatedly shown that they are extremely intelligent and even violent. If fish dare to hunt in their area, they will box and even fight them.

Points To Consider

  1. To which animal group do we classify octopuses?
  2. Where do we find octopuses?
  3. Do you know any other species of primates?

***

The original version of this article was published on October 12th.

English translation courtesy of JL FlannerTotal Slovenia News, an English language website with news from and about Slovenia.

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