The seals were shipped off late in March, the only glitch being the unavailability of the scheduled Air Force flight to get them to Auckland, because of the urgent aid requirements for Cyclone Pam.
"But they handled the road trip fine - no problems."
Mr Fergus said they were the right kind of seal to make such a long journey as New Zealand fur seals were a lot less sensitive than their Californian counterparts.
The Marineland site has now been cleared.
The temporary fences have been removed along with the ozone water treatment plants, the pools emptied and water turned off.
"It's all cleared for the next stage."
That next stage will be the redevelopment of the Marine Parade site into a multi-purpose entertainment facility.
Mayor Bill Dalton said plans for the new project were already well under way with work expected to start later in the year.
Skating bowls and sports areas will be complemented by the retention of the main grandstand, which will host audiences for sporting and other events.