The 'wreck' referred to is the viewing area, not the tank, which includes the Easter Island-style statues I associate so strongly with this aquarium.
I must say that I enjoyed this far more than I expected - my last visit shortly before the SLC era being vaguely disappointing (not helped by being unbelievably busy). All the good bits I remembered are still there and SeaLife have diversified it nicely. Probably the most enjoyable SLC visit I've had in some time (I can recommend opening time on a Thursday in November as a time to visit!).