Pearl is a jewel in Rockridge, but you have to know how to play it. It's tiny, and most of the tables are fixed to the wall/floor, so don't expect to be comfortably accommodated with a large party (I don't recommend showing up with more than 4 people). It's a great place to head to early in the evening (before the inevitable rush) to enjoy a cocktail or glass of wine with some raw dishes. Definitely this is what Pearl does best. The tuna poke is always spot-on fresh and delicious, as are the various rotating sashimis, ceviches, and oysters. The sweet potato fries are a sure bet as well. I avoid the Thai Fish Springrolls - they tend to be greasy and lacking in flavor.
Pros: Can park easily at BART; great raw dishes (Tuna Poke!); swanky bar atmosphere
Cons: Can be noisy; not practical for parties of more than 4; long waits during peak hours