Octopus must be caught with hands or instrument which does not penetrate the octopus, except that octopus taken while angling with hook and line may be retained.
That's exactly how its done here in Hawaii (other than diviing for them) with a Tako (Japanese for octopus) lure with two or more spikes at the end of a steel shank topped by a cowrie shell. You drag it on the bottom (30-200 ft deep), feel for the resistance, jerk it and haul it up. So I'm guessing pots or tubes in use in WA? BTW, they're great on the bbq or deep fried or made in po'ke. And they're probably a lot bigger than the 3-5 lb average size in Hawaii.... Any info greatly appreciated.