can't say I'm all that surprised, but it appears visitors may have missed their chance if they didn't see one of the earlier great whites:
Monterey Bay Aquarium to suspend collection/display of great white sharks. Pure luck that my visit in 2009 coincided with a great white.
Admittedly, it surprised me to read that
only the first of their six great whites caused a large increases in aquarium attendance.
Whether the post-release fate of the latest, the 2011 great white was caused by its time in captivity is anybody's guess, but I guess it may have influenced their decision. Regardless I do believe Monterey Bay's great whites have been such important ambassadors for the species that the program should have continued. As an addendum it might also be worth noting that another regular of the Open Ocean tank, the scalloped hammerhead is more threatened overall than the great white but obviously it isn't such a high profile species.