I'm a crab, get me out of here!

At about 3pm on December 31st I was walking past a fishmonger's run by an elderly couple. They were apologising to a customer that all they had left was crab. Trays of them. Later I walked by again and heard the old woman berating her husband. Maybe it was all his fault that they were left with all that unsold stock. And with the shop not due to open for another two days . . .