There are a couple of fresh seafood markets in the Delray Beach area.
Captain Clay's on NE 4th Street just west of US1.
Old Dixie Seafood on Dixe Highway in Boca Raton
Captain Franks on West Boyington Blvd in Boyington Beach.
As far as restaurants, there the Upperdeck at Bostons right ont he Ocean, 40 S Ocean Blvd. Mixed TA reviews.
J&J Raw Bar on E. Altantic. Good reviews from TA but not on the water. Or City Oyster right down the street.
Skip Old Calypso's in the same area though.