I recently had a seminar on Traditional Ecological Knowledge of the Tsawout First Nations group on Vancouver Island, Canada. And one of the interesting things I was told was that when harvesting GPOs, which they still do today, they only cut off one or two arms. The man who was speaking of this said that this had no effect on the individual's life (doubtful) and that they would regrow it soon. I have heard of cephs regrowing limbs, but would most or all of the GPOs likely recover from having them cut off? And how long would it likely take? I just wanted to know because if they don't recover successfully then it seems like a waste to only use one arm if it ends up killing the octo.