Yep, that's what I was thinking as well.
I used to fish commercially from Kodiak west to the date line.  One time while seining over on the mainland in about 80 fathoms, we saw what we initially thought was a sea lion chasing a sockeye across the surface.  We were all up on the flybridge "hunting" for jumpers, and saw it coming.  It went right by the bow.  NOT a sea lion...it was about a 100-120lb. halibut.  We couldn't believe it, but we all saw it, and watched it for about a minute and a half.  Our skipper was a third generation Kodiak seiner, and had never even heard of something like that.  Wish we could've got it on camera.