Simmer the tomatoes and arbol chilies in 4 cups of water for 15 minutes.
Add the tomatoes, chilies, garlic, and 1/4 cup of the simmering water to a food processor.
Purée until smooth. Stir in the vinegar and salt. Refrigerate until ready for use.
Heat up olive oil in a sauté pan over medium high heat. Sauté the onions and garlic for 2 minutes.
Add in the tomatoes, oregano, and bay leaf. Simmer for 3 minutes.
Add the cod to the pan. Cover and simmer for 6 minutes.
Break up the cod. Season with salt and pepper. Cook for 5 more minutes until the majority of the liquid has evaporated. Let cool.
Heat up a tbsp of oil in a sauté pan. Cook the tortillas for a minute a side to make them pliable.
Take a scoop of the cod mixture and place it in the center of the tortillas.
Seal up the tacos with 3 toothpicks per taco.
Heat up 1/2” deep of vegetable oil in a sauté pan over medium high heat. Add the tacos into the oil.
Fry for 3-4 minutes a side until crispy. Drain grease on a wire rack.