The fish in that aquarium ALL look great and BIG. The tiger SD's (M. fasciatus) also appear to be unusually large, and gorgeous.
The tank looks tiny in comparison, even though it seems to be 6' long. Obviously those fish can't stay there together for long but I would guess that store (very nice one) moves fish fast, and the water turnover must also be quite high.
Wish I had a store like that nearby...
