Fair enough I must have make the amateur error of watching the enclosure, only seeing the one, and thus interpreting this as being the total!
The enclosure does them no favours, I feel - too small, too stark and tucked out of the way. I wonder how many people of the non-zoonerd variety will notice when they eventually go?
Virtually none I imagine... strange how a once-thriving group of over a dozen in their old enclosure near the old Sealion pool, should have dwindled to what they have now.