Clean and rinse your fish and squid. Set aside.
Heat the butter in a large pot over medium-high heat until melted, then stir in the flour until incorporated. Constantly stir the roux for 10 -15 minutes until it darkens to a brown color.
Add the onion, bell pepper and garlic. Cook the vegetables for 5 minutes until soft.
Stir in the cajun, cayenne pepper, bay leaves, Worcestershire sauce, and salt. Stir well.
Slowly whisk in the seafood stock.
Add the fish and squid to the pot. Bring it to a simmer and cook for 10-15 minutes (the squid should be tender).
Add the shrimp last and cook until it turns pink, it should take 4-5 minutes. Check for seasoning and remove from heat.
Serve the seafood gumbo in bowls with rice and top with fresh chopped parsley. Enjoy!