I just found out about this, the aquarium closed to the public on 1st of June until further notice. Quake-prone aquarium shut | Otago Daily Times Online News : Otago, South Island, New Zealand & International News
there's a thread on Tonmo (a cephalopod forum) with some more info. Rather than cut-and-pasting, I'll just link: Breaking news from Portobello; kinda sad kinda exciting The gist of it is that the aquarium will probably be rebuilt on a different site, hopefully in or closer to town. If you've ever tried to get to the aquarium there you'll know it's a bugger without your own transport!!
this article says the aquarium building is going to be demolished: Earthquake-risk aquarium to be demolished | Otago Daily Times Online News : Otago, South Island, New Zealand & International News