Cool find!
Sun fish are fascinating creatures. We encounter a lot of them offshore. They swim right up to the boat as if they are checking us out. Interestingly enough they can actually jump. I've seen some pretty large ones come clear out of the water. Often times the small dinner plate sized juvenile fish will jump and we mistake then for tuna. Quite a few times we've slid in on what we thought were jumping tuna only to find a school of small sun fish floating along waving at us
We see a large number of sun fish, especially the larger ones, inshore during salmon and bottom fishing trips. Makes sense one would wander into the sound now and again.
Here's a pic of one of our deck hands with a juvenile sun fish that swam up to his boat this summer. Probably not the best idea to pull a fish out of the water, but a cool pic nonetheless