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.