Aw, even up there, the seawater temps can be tolerated when properly dressed. It's a virtual certainty they are in drysuits, with sufficient insulated undergarments for the temp. There are folks out there fishing from kayaks and even diving (as tides and currents allow) with that kind of gear. I have dove in our southern waters when the water temp was about 45-48F, and I was nice and warm with minimal 'stuff' under my drysuit. These guys would just have thicker undergarments.
I never knew being unbalanced was a requirement, but I'd say I might possibly maybe could check that box off...