They definetly migrate south of SD, look at Guadalupe- they are hanging around the LR boats at all times, I guess quite a few of the marine bios have been down there studying them- there have been a couple of the larger units spotted in LJ this year, one tore up a sea lion (YEEEAAH!) right in front of a lobster guy 1 mile off the Cove. That incident ran through my mind a few times during the board fishing tourney this year, we were fishing in 90' of water outside the kelp beds right off the cove. Although I doubt they would ever bother with a 12' log, doesn't have the profile to match their diet. Still...