Easy Seafood Gumbo

Name: Easy Seafood Gumbo
Ingredients: 2 tbsp vegetable oil; 3/4 cup plain flour; 2 onions, chopped; 1 green capsicum, chopped; 1 clove garlic, chopped; 1.5 litre fish stock; 600g ripe tomatoes, diced; 1 tsp dried thyme; 2 bay leaves; 1 tbsp Worcestershire sauce; 1 tsp salt; 1/2 tsp chilli flakes; 2 blue swimmer crabs, cleaned and split; 500g green prawns, peeled and deveined; 24 scallops; 350g blue eye cod, chopped; Hot cooked rice; 1/4 bunch spring onions, chopped for garnish; 1/4 bunch flat leaf parsley, for garnish