When used in sushi, octopus meat is poached slightly before being used. (You have to because octopus skin is full of bacterias and possibly parasites) Before it is cooked, octopus skin is semi-transparent and it will turn into a solid white colour after being cooked briefly. The cut of octopus meat is especially important because if you made too thick a cut, the sliced octopus will be too thick to chew on. It takes a sushi master to do the job well, because the octopus meat is so slippery an...