There's also the soup fin which often cause fishermen problems out of Westport, but it's brown in color and not usually that big. We do supposedly get makos especially with the warm weather and water we have, they are a beautiful blue in color, like a blue shark but bigger and badder.
I'd lean towards the salmon shark. They don't have to come from Alaska, they are native to our waters and I'm pretty positive we had an encounter with one out of lapush during halibut season, it was probably close to 2ft wide and I was told it was half the length of the boat... I think that was an exaggeration as that would make it 15ft. I only got to see a glimpse of it swimming away from the boat and down to the abyss. I've seen salmon sharks feeding on silvers out of neah bay before, jumping clear out of the water like you'd see on shark week, awesome stuff.
