This is my local fish shop and I wander up there every couple of weeks to admire their current stock. They carry a large range of tropical and marine fish and they always seem active and well looked after. If any of the fish have been ill they stick a 'not for sale' on the front of the tank until the others have been quarantined, so you can trust that they're not selling you anything substandard.
The staff are friendly and helpful, and are always keen to advise. The prices aren't the cheapest around, but the quality is excellent - I've bought many fish from this shop over the past 16 months and have only lost one, which suggests to me that they are of a very high quality. There are labels above each tank, showing a photograph of the fish and a short description of their preferences, which is very helpful.
They also stock a small range of aquariums, and other fish keeping paraphenalia. read more