In seaports around the world—in countries from Brazil to India to Vietnam—fish soup takes pride of place at family tables and other gatherings. Simple, authentic, and full of flavor, fish soup is well-suited to entertaining wherever you are. As early summer approaches, fish makes a light base for soups that won't require much effort or a battery of equipment to prepare.

Fish stock—the backbone for many of these recipes—is less time-consuming to prepare than beef or chicken stock. At the market, buy whole fish, have the fishmonger fillet it, and take the bones along with the fillets. You can freeze the bones until you're ready to use them, or make the stock ahead of time. The stock freezes well, and it's great for making pasta dishes, sauces, and more.

To prepare for your party, get a jump on the cooking. Make the soup up to a day ahead, leaving out the fish. As the soup reheats, add the fish to cook just before serving. Round out the menu with a tossed green salad and a simple side dish, such as hot cooked herbed rice or crusty bread.

Armed with these recipes, a stockpot, wooden spoon, blender, and sieve, you have the elements for superb soup and a great casual gathering.