This family business sells amazing seafood from oysters, mussels, lobster, and a wide variety of fish. Make sure you check their website for weekly specials and call to reserve so you don't miss out. There were several times that I didn't find the oysters or mussels I wanted for my meal and had to buy the next best thing.
The sell seafood at a reasonable price while supplying many restaurants across the city. New shipments are received twice a week for freshness (I believe Monday and Thursdays). I usually buy these plus specialty items like scallop and uni.
Definitely worth a try if you plan to have a party at home. They also have a restaurant next door which serve their fresh seafood. It's not too fancy but the food is worth a try if you are lazy to cook. They also participate at festivals selling their fresh oysters but I rather buy and shuck.