There's a lot to grab your attention at Kim Son Vietnamese Bistro - bright-painted walls, flat-screen TV sets, a menu with 170 choices - so focus on the tanks along the dining room's back wall. The crabs, lobsters and fish swimming there are the house speciality. Try cua rang me, a whole Dungeness crab in a sweet-tart tamarind sauce studded with fiery chiles; or one of four different lobster preparations. You'll also find the standard array of such popular Vietnamese dishes as pho, bun (various meats served over vermicelli) and spring rolls. More adventurous diners may want to try what the menu terms "Classic but Unique Dishes," among them quail, Cornish hen and frog legs.