To make seafood gumbo, make a roux of oil and flour, and add vegetables such as onions, celery and green peppers. Add broth and seasonings to the pot, and then boil it. Finally, add seafood to the mixture near the end of the cooking time.
TasteOfHome.com offers a basic seafood gumbo recipe featuring shrimp. The recipe calls for chicken broth and water and uses Cajun seasoning, oregano, black pepper and paprika to spice the dish.
FoodNetwork.com offers a more complex dish requiring seafood stock and various types of seafood. The vegetables include classic onions, celery and green peppers, plus green onions and parsley. The recipe also calls for shrimp, lump crab meat, oysters and crab claw meat. The site recommends serving the gumbo over rice.
FineCooking.com's version of seafood gumbo is more time-consuming, but the recipe describes how to make all of the dish's components from scratch. Before beginning the gumbo, make a shrimp stock from shrimp heads and peels along with vegetable scraps. Fry the okra on its own to develop color and texture. The gumbo itself features crab meat and oysters and is spiced with thyme, bay leaf and black pepper. Before serving, season the dish with Louisiana hot sauce to taste.