Female octopuses (Octopus tetricus) have been observed throwing shells, silt, and other debris toward nearby individuals, including males, in natural settings in Jervis Bay, Australia. This behavior was documented in a field study published in PLOS ONE (https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0276482) and later summarized in science reporting. The article detailing the findings/video from the study can be found here: https://www.newscientist.com/article/2287879-female-octopuses-throw-things-at-males-that-are-harassing-them/
Overall, the evidence shows that throwing is real and sometimes occurs during social interactions, especially when males approach females. In some recorded cases, the direction and timing of throws suggest they may be aimed at other octopuses, which has led researchers to consider whether this could function as a form of rejection or disruption during unwanted attention. However, the interpretation is not settled. The same throwing actions also occur during routine behaviors like den cleaning or digging, meaning some “throws” may be accidental rather than deliberate targeting. Because of this overlap, scientists avoid claiming clear intent or communication and instead describe the behavior as context-dependent and only sometimes possibly directed. In the case of the video, the female is throwing silt/rocks at a male to deter him from approaching her.
In short: octopie do throw objects, sometimes in social contexts involving males, but whether this is intentional “targeting” or just incidental debris movement is still unresolved.