Another great water view place with a stellar beer list is Tony P's Dockside Grill (just about next door to Cafe Del Rey). Whatever you do don't go to Shanghai Red's or the Warehouse or any of the tourist traps in the Fisherman's Village. Killer Shrimp has a pretty new place along that same stretch of road as Tony P's and Cafe Del Rey, but it has been getting some later lukewarm reviews here so it might not be a great idea at this point.
Mendocino Farms has some of the best sandwiches in the city. Love their Steak Blt with
carved steak, applewood bacon, romaine lettuce, roasted tomatoes, herb aioli, caramelized onions on toasted rustic white bread + blue cheese crumbles. Very casual. Very highly recommended. They do have a patio but no Marina water view. You can always picnic at Burton Chase Park a few blocks away with full marina view.
4724 Admiralty Way, Marina del Rey, CA 90292