Great, Quality Fish; But Not Cheap
My wife and I have eaten here several times, and always enjoyed it. But we have ordered 'take-out' dozens more times. We love the food. But the prices do reflect the quality.
As several other reviewers have noted, the quality of their fresh fish really is superb. This really surprised me the first time I went in there, because it's located in north PB, not far from a long string of bars and pubs. The Fishery is notably more upscale (and higher priced) than other businesses around it. But you'd hardly know that from the unassuming exterior.
The interior is pretty small. But when we've eaten there I've never felt cramped. (In part because, as others have noted, much of the business seems to be from people picking up "to go" orders. I've never been there when the restaurant itself was full.) But when we have eaten there, I've found the service to be excellent as well. Attentive but not stifling. And knowledgeable about the menu and the wines.
Our clear favorite the ceviche. But the clam chowder (which I don't normally like) is also really good. Because we've been there many times, we've had many, many things on the menu and never been disappointed.