What do you know ..... there is a cast iron cookware that is specially designed for making bouillabaisse. It is called Staub bouillabaisse and, of course, it is handmade in France. When cooking with this pot, you need to use medium to low temperatures. Be sure to use wood or plastic utensils as metal ones might damage the pot. You need to wash it by hand. It has a cute little metal fish sitting on top of the handle.
Each of these pots takes an entire day for artisans to make using a sand mold. The bottom of the pot is almost flat, so the soup heats evenly and quickly. One drawback, the bouillabaisse pot is a little on the expensive side!