The Octagon Print on the Floor of the Ocean

A German university research team new study in June 2023 they shared observations and camera footage of an octopus species making these octagon shapes. There is a serrated species of octopus called seratutus muleri it's one of the only ones that lives in Arctic waters. The way they hunt for food is they sort of descend all the way to the bottom of the ocean plant their eight arms which have webbing between them like  the Roomba.