Big fish store with a gourmet grocery component. They had good prices on fresh fish and everything looked much fresher than seafood at other places, ie. Atwater market.
A big variety of fresh fish, and oysters. They'll let you try some oysters before you buy. Prices are fair considering the freshness. I took home some raw organic salmon for tartare that was still good the next day.
Feel free to ask them any questions as they are pretty knowledgeable, they even have their own cookbook for sale. Check out their website for weekly specials.