The reason I axed is that we hook into an occasional porpoise up north and I can remember hooking one in the San Juans about 20 years. They are fond of halibut gear and I've hooked them as deep as 400 feet down on the bottom. Jigs, hoochies, chunks of meat, horse herring...they will bite them all. We even doubled up on the damn things a few years ago. That was a royal cluster ##ck.

They come up so far way from the boat and their dorsal is so small you can't tell it's a porpoise at first. The fight sounds about like what you guys are describing except your mystery fish might stay downtown a bit more. Porpoise eat herring, squid, and other baitfish for a living.

We've hooked them on super heavy halibut gear and Penn 345's and you can't even begin to stop them.

Not sure if that's the beast that's been bothering ya'all on the sound, but it sure sounds like a likely culprit.

Or maybe Stam's 1,000 pound halibut decided to migrate into the Puget Sound